Malicious PDF — malware analysis report

Static analysis result for SHA-256 878c19ff7d3c5b5d…

MALICIOUS

PDF

54.7 KB Created: 2020-08-08 00:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01557827f38f5ff35bd12edecb7104fc SHA-1: a120d8ff817be432a17012283722991ef22ac5ce SHA-256: 878c19ff7d3c5b5de42ef93b590540dd42bafc3fdbbc1c0185f8c4595f7542d2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The primary lure appears to be a "free download" for "basic pharmacokinetics second edition pdf", which redirects to `https://ttraff.cc/wb?keyword=basic%20pharmacokinetics%20second%20edition%20pdf`. This suggests a phishing or scam campaign leveraging SEO link farms to distribute malicious content.

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/wb?keyword=basic%20pharmacokinetics%20second%20edition%20pdf In PDF document text
    • http://files.pinchalog.de/uploads/1/3/1/4/131454620/zivavegozatizinaw.pdfIn PDF document text
    • http://files.shoreexcursionsambercove.com/uploads/1/3/0/7/130738960/leronavekawul_togifivijiref.pdfIn PDF document text
    • http://files.hawkesburyartist.com/uploads/1/3/2/3/132302859/zojizobukop-tetinedif-xasexemiv.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/1/0432/7977/7952/files/webekekafalurawave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1007/6322/files/54349853249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/79106777895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/kemabufuwegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/libro_el_cerebro_obeso_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/kerijatajuvubatit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/94102562648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/37989150166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8613/8792/files/osaka_amazing_pass_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/returixefora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/xapafotuzini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/90411059009.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 4

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_off00008bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF7 5476 bytes
SHA-256: fc9764978e47c7c446f2c71656eb2aeb35c6c404998891f5ab2de11eaf793328
font_01_sfnt_off00009e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6A 15352 bytes
SHA-256: d5b7d2980a3e67dea4a1e81bdfb46977674bdfef96fc002c3255e7b2ee9284ab

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