Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ff34f6b05d6fc2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-06 20:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bcc3440d0698c58cb1b377b58c1d8a0f SHA-1: 5204a8da642c0f39689827b21a9ed9308a1720cb SHA-256: a4ff34f6b05d6fc255059d8a737aaab3d9871d95e04ed9d213975ef02a0b0dfa
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=entrepreneurship+development+pdf+calicut+university In PDF document text
    • http://files.fullmoonhealingarts.com/uploads/1/3/1/3/131383386/wojolugefip.pdfIn PDF document text
    • http://files.ladyseacolts.com/uploads/1/3/0/7/130740561/nanusesujetufiromif.pdfIn PDF document text
    • http://files.wallsofwondersaddlebrooke.com/uploads/1/3/1/3/131379719/kezedeboliv.pdfIn PDF document text
    • http://files.cgc-detroit.org/uploads/1/3/0/9/130969061/puxixemokaba_pedagor_pibopoxa_nirus.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/1/0435/6158/2755/files/2535137541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1386/4615/files/61180567276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4017/0406/files/bokikifamoditejiziloti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/twitch_discord_webhook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/fulokoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/28227027461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/classic_wow_bis_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/tuderurirudoboti.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_off00006337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6337 5516 bytes
SHA-256: dc8a1715a83376a9aae5db827550667f27bac645c1912154f880eabc3f07b0c3
font_01_sfnt_off000075e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 14224 bytes
SHA-256: 08dd5fd899a2c64fd4ca479d7155c7736dd649d3cb2d786c3732eb25d6184678

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