Malicious PDF — malware analysis report

Static analysis result for SHA-256 6655985b28718396…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 18:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 420afcdd57b73d26968293ac0ad7c8a2 SHA-1: 9b0efd3c206ebd59d90ad457fb03eca0c316a142 SHA-256: 6655985b287183966593fd15d981694f19a400bf535a6fb92779683e172f97c9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains text and URLs that suggest a lure for free PDF downloads, specifically related to anatomy. This pattern is indicative of a phishing or scam campaign aiming to drive traffic to malicious sites or distribute malware.

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=anatomy+drawing+school+human+animal+comparative+anatomy+pdf+free+download In PDF document text
    • http://files.colinlamb.com/uploads/1/3/0/7/130775434/a43594483a.pdfIn PDF document text
    • http://besozip.leeannewright.com/uploads/1/3/1/6/131606490/769410.pdfIn PDF document text
    • http://files.soilihuhtakallio.com/uploads/1/3/1/3/131379899/2bd2d87.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/1/0437/3259/8938/files/hepatic_encephalopathy_guidelines_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/46814485477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/85005440643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/87919260388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/24251372707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/43227143431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/naruto_tabletop_rpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/lament_configurum_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/61502875924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/kofowolexod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/immersive_patrols_sse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/amc_10b_2014.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5812 bytes
SHA-256: ba5e2aae7a4225d80abe76c2c3412c223250b8f3c2a12194628b9d735a9127b7
font_01_sfnt_off00007970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7970 10024 bytes
SHA-256: d59bf72d24ebbf4fb1a132fd180394a1cd191f7eaa6fe80f51e33cd54b636aed

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