Malicious PDF — malware analysis report

Static analysis result for SHA-256 891546e8be20c4ac…

MALICIOUS

PDF

125.0 KB Created: 2020-08-10 06:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 254d313d0f7328bbeae54387c2e88cfd SHA-1: ebe0b28fa317e173e97abc38d6d2fa5261db6c06 SHA-256: 891546e8be20c4ac9c51a7795232fc837b08ca2744f8854277dbb2e889cf4fee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that appears to be part of an SEO link farm designed to distribute malicious or unwanted content. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it's the primary lure. The presence of many PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=english+brushup+5th+edition+pdf+free In PDF document text
    • http://files.herbaculture.org/uploads/1/3/1/3/131383720/toxilowexibepesapi.pdfIn PDF document text
    • http://files.renevelarde.net/uploads/1/3/1/6/131606431/87142fe.pdfIn PDF document text
    • http://files.now-hope.org/uploads/1/3/1/4/131409009/pawaram.pdfIn PDF document text
    • http://tosiji.mackaychocolatebouquets.com.au/uploads/1/3/1/3/131380213/8902773.pdfIn PDF document text
    • http://nukimerip.msjchem.com/uploads/1/3/2/7/132740873/xidolozeg.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/28961070020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/84384961580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1341/3786/files/bendigo_bank_term_deposit_rates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/fake_college_acceptance_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/dns_server_unavailable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/pfsense_freenas_jail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/48807190132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/3494321508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/56960064629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/xetuvijego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/wevonugasenuwofatefomax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9382/6467/files/zumowabuwirukazipapo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001262a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1262A 11520 bytes
SHA-256: 69df7c9faf7511ece004a981dcfb9ddafc1f38e111b28399d5ed84b0c38eaaa6
stream_009_off00018497.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18497 30880 bytes
SHA-256: 0daeac68262450823d5589a4dd000c2442dd8b039c87ab202cdc4882dc28b8a8
font_00_sfnt_off0000bd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD69 24256 bytes
SHA-256: 30c747c37f277412cea3ca029775b71a1bbf7889be097bd20cd909184c21bc33
font_01_sfnt_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 5196 bytes
SHA-256: 37c312447a992fee30a7ba18101e2e8522df44bbe6111925dfbf1a16b4b34954
font_02_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 2188 bytes
SHA-256: 7d52a69efacf94308061ddcc7f5e4480d44ba60ac9b19c81a3efa62dad374059
font_04_sfnt_off000146a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A6 21684 bytes
SHA-256: 4f0b0bb950f3618d28bcdb0318fd5694e4eab8a525025eb31e1a70765fc0b828
font_06_sfnt_off0001bb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB46 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_07_sfnt_off0001c946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C946 7904 bytes
SHA-256: 8b2d1158fdb4f9413a27e88b9af7a2bbcd9328a4227587e2a95fde3c0cdbbf4a

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