Malicious PDF — malware analysis report

Static analysis result for SHA-256 67103b5ca926c145…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 02:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c6d19b43767b4608c7182c78cf6ac36 SHA-1: 21cbe7940168d8ce1d2c0ab2dc4d9eb3fecc3cc7 SHA-256: 67103b5ca926c145066b200fe0feb77b8b6f5d95af91cd992d4065c29042bc7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a critical finding of a PDF redirector link pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting a lure to a malicious site. The presence of numerous PDF links, many pointing to Shopify, indicates a potential SEO poisoning or link farm tactic 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/pify?keyword=square+root+of+243+in+radical+form In PDF document text
    • http://meluxuf.theheartofgolf.com/uploads/1/3/0/9/130969191/nabudetosabowotewaw.pdfIn PDF document text
    • http://paxefo.annabellalwin.com/uploads/1/3/1/4/131453463/xanoliwewutamej.pdfIn PDF document text
    • http://puzege.phisigmapidavis.com/uploads/1/3/1/3/131379730/sujipijelenewurex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/katedaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/smartsheet_training_nz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/nazafejibegeluferofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/79420627949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/6699414574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/xijosixuwizivotasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/30789805473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/31998169982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/72891894104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/vilofaloxisafokon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x542F 5484 bytes
SHA-256: 1664832449e378fff3a7c266913f665612f611241d88f73afe1f5285aff33393
font_01_sfnt_off000066ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BA 10160 bytes
SHA-256: 23e142771cd84cae07fac4a5ec4ee10e70ad41ef86331cefbdb7758fd68bdad5
font_02_sfnt_off00008946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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