Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b1d8ae640a12eb…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 00:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdcb80731ca7c5072dded61a92b408bc SHA-1: b1999f5d8509495c6069f57ab2810be108c8efb8 SHA-256: 28b1d8ae640a12eb9fab1b92bd464667ac96c6ec2e6d029f24af6dcc16a69c4b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'assessment tools for anxiety pdf', suggesting a lure. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites. The primary attack pattern involves tricking users into clicking a malicious link disguised as a helpful resource.

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=assessment+tools+for+anxiety+pdf In PDF document text
    • http://nadur.hopewarmingpontiac.org/uploads/1/3/1/4/131438464/13cec5cdce5ba.pdfIn PDF document text
    • http://files.bluemountainsafricanvioletsaus.com/uploads/1/3/1/4/131452958/buvelafuvozag_badavag_zixib_vulanujerizitex.pdfIn PDF document text
    • http://files.ourladyqueenofpeace.org/uploads/1/3/1/0/131069789/butanabaxufa.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/1/0428/1086/7871/files/kunafejujigibos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/zidates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2378/4360/files/equifax_credit_dispute_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/14263212770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/forgotten_realms_campaign_setting_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/vinadajipokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/8907/8946/files/55145858361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/65491078455.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 5

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_off00005d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 5136 bytes
SHA-256: 5d2dd16d645b06b82c562c86e3d701e686b97592ec8958ec733a735020707bfc
font_01_sfnt_off00006eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 11124 bytes
SHA-256: 22ca5b8c563a5d13a76bba416db028dc55c17cf806c4167d32eeae4686f2b017
font_02_sfnt_off000093f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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