Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81ada6511194403…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 01:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1552113e982cfb489e8e8e10b854319a SHA-1: 548befc435c25d3bdd2b23d45c70151d8ee98102 SHA-256: a81ada651119440380415615a226fb0d981d1f068bdb4eedd383a480992dd4df
194 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a primary malicious redirector URL pointing to 'https://ttraff.cc/pify?keyword=boiling+point+elevation+sample+problems+with+answers'. This indicates a likely phishing or malware distribution attempt disguised as academic content. The ML classifier strongly supports the malicious verdict.

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=boiling+point+elevation+sample+problems+with+answers In PDF document text
    • http://files.organizedhaven.com/uploads/1/3/2/3/132303351/mutatapabokon_tisutixopirigi.pdfIn PDF document text
    • http://dibezeruw.xy-yang.com/uploads/1/3/0/7/130775997/soxotelubo_burep.pdfIn PDF document text
    • http://files.livelovelo.com/uploads/1/3/1/4/131410736/xenokivadudijakilu.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/1/0434/8005/5958/files/bepuzedujobilozigat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/56886245548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/ojt_application_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/the_brief_mcgraw_hill_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/14731826584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/kovepivajumafobejewum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/time_attendance_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/28305045356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/the_cherry_tree_by_ruskin_bond_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4958/1730/files/34113908793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/simplicity_broadmoor_parts.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 4

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_off00006d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9D 5572 bytes
SHA-256: 64e2b1ee08b5d6beca3f7b8873dadab47d5a28c6e291b910e5d6c7e43d5805db
font_01_sfnt_off00008074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8074 11352 bytes
SHA-256: 2a9ce43590671eaafde53d0fb9e4012e3bbe9964f4a374aa5fcc5e851eb48076

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