Malicious PDF — malware analysis report

Static analysis result for SHA-256 99554ab2853cf45b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 19:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1927255f02c9460c3e0062bc20f2d47a SHA-1: 3c4a61f2ca091b33050fb10fbe9d0b913b5361d8 SHA-256: 99554ab2853cf45b3f0188e6d7f1fa32137722f803a21b1b5ea075498ab1638f
202 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, masquerading as academic papers. One prominent link, https://ttraff.cc/wb?keyword=philosophy%20of%20mind%20j%20a%20shaffer%20pdf, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=philosophy%20of%20mind%20j%20a%20shaffer%20pdf In PDF document text
    • http://files.patricedworkin.com/uploads/1/3/2/8/132814567/5110912.pdfIn PDF document text
    • http://files.grundycfb.com/uploads/1/3/1/4/131483372/2219135.pdfIn PDF document text
    • http://womebikil.laughalotpaintandsip.com/uploads/1/3/1/1/131164250/e71f1aef4f1e971.pdfIn PDF document text
    • http://files.dceverestdanceteam.com/uploads/1/3/0/9/130969984/pubuwixo.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/1/0434/3290/2806/files/sonosuramukuzirutuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4075/8170/files/3d_maker_for_autocad_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/zekaxetufomuguwositenuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/important_banking_and_financial_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/bescherelle_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/44582257717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/ruzuvonakamanoniju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/77497098006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/9912762063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/22051597248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/dularoku.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 6

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_off000060ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CE 5460 bytes
SHA-256: 30743df1d37e536972396c8c0947e2a12ba4c0c9a9346f1e6667040d05e3bea1
font_01_sfnt_off00007343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 10352 bytes
SHA-256: a1891762196c62312e7508ed85b1383cdb47ae340846e7a732b5d3a0c1db932d

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