Malicious PDF — malware analysis report

Static analysis result for SHA-256 6376e553cdbe4d40…

MALICIOUS

PDF

116.2 KB Created: 2020-08-13 21:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b779a6f14b4464847b87d3841bcc8af7 SHA-1: fcde72a93a0228f857b7aee6257c6cb324b49d57 SHA-256: 6376e553cdbe4d4087008ec6de75a88138af16d6fbee757323d3ea6817806d9f
194 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to a redirector URL. The embedded URL and the document body text both contain the same redirector URL, suggesting an attempt to trick users into visiting a malicious site under the guise of a free download. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.cc/pify?keyword=equus+africanus+asinus+pdf In PDF document text
    • http://files.neilbuanarchitects.com/uploads/1/3/2/8/132815343/wasim.pdfIn PDF document text
    • http://files.dearborn411.com/uploads/1/3/1/4/131453735/75f39540d26fbf.pdfIn PDF document text
    • http://files.gailgilmoreceramics.com/uploads/1/3/1/4/131438397/rutibuwobazokudaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/49589704942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/fobapuwelezupikawadamolut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8791/1319/files/tisutubezadigigilamasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/13552572016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/15512477227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/be_all_you_can_be_john_maxwell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/8193922881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/drudge_report_feed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/xefipinere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/37728352369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/72138147751.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://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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_012_off00019bd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19BD9 21472 bytes
SHA-256: af2c8cbf305a70d67e8189c2bc155026509677ea798bde29d4445c9612d320cf
font_00_sfnt_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 6560 bytes
SHA-256: fd998f469932a356d69ff88e72c7c54be283717d5a9e68cf8f555d69e064c82f
font_01_sfnt_off00010849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 5200 bytes
SHA-256: 121f1041f1c3b2392c1c3c937b0cc5b056aeb868d045048a0656096f46edfabf
font_02_sfnt_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 3452 bytes
SHA-256: 9f2551b5e42dba5dd7e94cfd32243d38d9179b8d1a3c63d631ac48eb30037cba
font_03_sfnt_off00012740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12740 3980 bytes
SHA-256: 3be2d3040db16d025ddf45567046b168f29b86043011fce62d82df6b8b555933
font_04_sfnt_off00013683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13683 3020 bytes
SHA-256: 6759c27010ce147157f808b010cf6b9db03229c8b5cb51e0d40fe8a94eb07f45
font_05_sfnt_off0001430a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430A 2872 bytes
SHA-256: f35666e3f5ef0c3be5cd897f04a8f0b91e0302023e312e06f0ed8ca934f4769f
font_06_sfnt_off00014f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F12 6464 bytes
SHA-256: 0da469baa2db4af63515a7cf94b47b0e326b170b51d17e866a28d8bbaa6edeed
font_07_sfnt_off00016006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16006 21312 bytes
SHA-256: cb1864e6da4e76d385eb309b9a3994d568a0affb436e75f966c754597371d34b

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