Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bfe16eb2477d85…

MALICIOUS

PDF

61.6 KB Created: 2020-08-03 05:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9781018a40f16683b6e59c1b42419f5a SHA-1: f25bb4323b728626d700d3b205c84e44a3b8827c SHA-256: d3bfe16eb2477d85e99d9bf86ccdb02f39057899729a15fa5bb8154e4ce5613b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=binary+tree+implementation+python'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a link farm further supports the malicious intent, aiming to obscure the final destination or increase the chances of a click. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=binary+tree+implementation+python In PDF document text
    • http://files.laharpelibrary.com/uploads/1/3/1/4/131453248/31b928dd5f39b91.pdfIn PDF document text
    • http://files.burnsidecenter.com/uploads/1/3/0/9/130969080/jikamupivazuluges.pdfIn PDF document text
    • http://files.devotie.com/uploads/1/3/1/8/131857758/banilowujumu-korutakewuxe.pdfIn PDF document text
    • http://files.miccheckentertainment.co.uk/uploads/1/3/1/3/131383483/b3243d0c131ab.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/1/0427/8393/2582/files/nerukinovavul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8873/1546/files/98507640899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7160/2849/files/37360440316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/3576953516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0200/2595/files/tejubejasupusomefoveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/vamoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/74299819682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/68656182693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/94189389383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8516/6760/files/nawedumogaselewire.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_off0000a648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA648 5032 bytes
SHA-256: d8f958c5079244479b430aa1625014b86c6a6c8c707f9fa91149b010662cb0ec
font_01_sfnt_off0000b73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73F 15964 bytes
SHA-256: bd958a771000af02e4311a6df5c3353b163a03d05970eba6954e81d16a31dad5

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