Malicious PDF — malware analysis report

Static analysis result for SHA-256 284e843a9dc41ce9…

MALICIOUS

PDF

50.7 KB Created: 2020-08-14 07:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7df0a7f8c21e8ea30f837d46c08f6e9e SHA-1: a2562427ef4a334c41f52eba6434022fcf8732e1 SHA-256: 284e843a9dc41ce914f9ee3b1aa33d602f1a861c27973e5710a439bcc0490ce4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary link, https://ttraff.cc/pify?keyword=example+introduction+for+biology+lab+report, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to academic reports and includes the same malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=example+introduction+for+biology+lab+report In PDF document text
    • http://files.pitchperfectok.com/uploads/1/3/1/6/131637553/joxagoxiwuferijef.pdfIn PDF document text
    • http://files.aeinstructional.com/uploads/1/3/1/8/131872273/kamakijifofogole.pdfIn PDF document text
    • http://fukubudap.bqpublishing.com/uploads/1/3/1/0/131071021/aa839a1b87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/satyanarayana_biochemistry_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/9470/7095/files/pepsi_logo_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0469/8535/files/one_ring_rpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/anabasis_trke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/39643707179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/archivo_ingles_a_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/27638517895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6861/4808/files/sociolinguistics_and_language_teaching_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/hot_springs_spa_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/nukobesebaxokejutazubev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/kotisutezigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/83162853865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/69472129680.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7035 5564 bytes
SHA-256: 3cbc3710fc7cb70167341281e3faada74fa0e33288699a7dffeb0f4c1bc2277a
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 10512 bytes
SHA-256: 13e827d7cee22ebc3e399462cd7c6db821838ec0cd013a367d59fe3b189349e5
font_02_sfnt_off0000a6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EC 16328 bytes
SHA-256: c4483d0a2685d558df97df6ba840746f2870e6254d6d5d8edd69700eac20a654