Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fe1782392e7d29…

MALICIOUS

PDF

44.9 KB Created: 2020-08-21 12:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aaa7bf89115d5a8ee2ebcdabbca05ccd SHA-1: 4ce3b9edaef5a072a4409cfd5b3782dfc3a3b4d9 SHA-256: 21fe1782392e7d29f2d6c773d7d7e49bb6e4e9f59dd52bd18ed54c153e378387
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text referencing a 'government free credit report' and the malicious URL itself, suggesting a phishing or scam lure. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of outbound links, further supporting the malicious intent of redirecting users to external sites.

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=government+free+credit+report In PDF document text
    • http://files.intermezzogallery.com/uploads/1/3/1/0/131070113/32561cbfe7ebe.pdfIn PDF document text
    • http://files.wwidbq.com/uploads/1/3/0/8/130814066/kufurovudu.pdfIn PDF document text
    • http://files.tasty-ink.com/uploads/1/3/1/4/131437636/4162147.pdfIn PDF document text
    • http://files.kiberacreativearts.org/uploads/1/3/1/6/131636988/8976299.pdfIn PDF document text
    • http://gevefiw.morrispublishingaustralia.com/uploads/1/3/1/0/131071243/5955577.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/1/0429/2929/1427/files/44492774301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/1645739057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/61097572094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/bumuwupik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4718/8640/files/jutadinenam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6372/4443/files/17879888369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/73482980275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3151/7592/files/pofabipezivejusozedokuw.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_off000072dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DD 4972 bytes
SHA-256: 4294947819f64def660be5ea66fca0498e481df4145f76fec42cc05085370c7a
font_01_sfnt_off000083c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C1 10332 bytes
SHA-256: 54c2c28435a9a7e56dada2d3afa2dde75c9efe669bb1b768c79b36d22cf98943

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