Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc085a20b2b0050…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 07:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce45d9b59c41709f05bb7145e7a5faa9 SHA-1: 488d432388f72b3faa8a6890ce658a5bbbf9bb78 SHA-256: afc085a20b2b0050304a5104f37093655f7baed5961e44eee8aa765d4368eee5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for educational materials, suggesting a phishing or social engineering attempt. 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.cc/pify?keyword=spectrum+word+study+and+phonics+grade+1+pdf In PDF document text
    • http://files.emilymariephotographie.com/uploads/1/3/1/8/131860204/vuwisejexolokanula.pdfIn PDF document text
    • http://files.simplyscrunchyeg.com/uploads/1/3/1/0/131070151/tujadevesugigogujuz.pdfIn PDF document text
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdfIn PDF document text
    • http://files.travelingdoves.com/uploads/1/3/2/7/132712315/b9d69f31.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/1/0431/5712/7336/files/ems_field_guide_bls_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/80824263413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/sanagifekogonif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/vaxelafogajer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6945/2967/files/inequality_word_problems_algebra_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/setikufavel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/doduwakuresubowudiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/rapamerimelemaguwikovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/43823051428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/resisuwurubetonijuj.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_off000060a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 5884 bytes
SHA-256: 6b0444909a9b5013ab2b66c8cf1a38ea4bb2da9b368defc417303658d32daa3d
font_01_sfnt_off0000749a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 9824 bytes
SHA-256: c9063e8c830ed1ec2dc31c8219e63b5d0465d03e56df4af2ceb619dc4541c7e3

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