Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bbbf634edc5a37…

MALICIOUS

PDF

39.7 KB Created: 2020-08-28 13:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c054f7b79342578ec2d3c5a7b59024ac SHA-1: c9bdb6382997208eacd87228697b02944eb59a16 SHA-256: c6bbbf634edc5a37e2add8893f5eea3937bc9400804a437a499e96bfd4e96154
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic firing for a link to a known malicious redirector. The document body contains this URL, which is likely used to obscure the final destination and potentially deliver a malicious payload or lead to a phishing page. The presence of numerous external links, many pointing to Shopify domains with numeric slugs, suggests a link farm or SEO poisoning tactic to attract victims. No scripts were extracted from this sample.

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=wireshark+101%253A+essential+skills+for+network+analysis In PDF document text
    • http://jewaraso.d-aleksandar.com/uploads/1/3/1/8/131856072/7fe695da2346.pdfIn PDF document text
    • http://tegutovim.mike-rents.com/uploads/1/3/1/4/131453114/kujojorusuwinu.pdfIn PDF document text
    • http://fujafaz.rockinpfarmandfeed.com/uploads/1/3/1/6/131607407/6597731.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/1/0432/9380/2646/files/39784444122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/siruvar_kathaigal_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/70991917510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/bowapaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/bomefebov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/vezobulinaregatofanozel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1046/files/munarunavemuwogesira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/89124784875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/ribajofotomidijozajizex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/kulipedoremukoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/how_to_fill_airmen_application_form.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 8

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_off00005c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 5372 bytes
SHA-256: 7b86462aa7a186deedc88bd25c681e0ad65fea663e9fbc5b9af8abfdd3120067
font_01_sfnt_off00006e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 10380 bytes
SHA-256: 1803f955cf893d187ebc11985d5e7b988eeff059c1dca82e98695c8d7ff90b75

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