Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f4c10437eb5b43…

MALICIOUS

PDF

44.5 KB Created: 2020-08-05 10:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 423e1255bb7999d7838a304f8270bfff SHA-1: f9ffbff5975eecb2fbeeed0622dcb12899c2b600 SHA-256: 22f4c10437eb5b4318f114a63e6b5f022cd3bf8dbc7ae9cd93ed92758527b844
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body text, though heavily obfuscated, contains the phrase 'Gate 2020 ee question paper pdf' and the malicious URL, suggesting a lure for exam-related content. The primary malicious URL is ttraff.ru, which is known to host redirectors. Several other URLs point to Shopify, likely used to host decoy PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gate+2020+ee+question+paper+pdf In PDF document text
    • http://files.orfeonportuense.com/uploads/1/3/1/4/131453329/833a7ce6844.pdfIn PDF document text
    • http://files.ayrshirejudoclub.co.uk/uploads/1/3/1/8/131856166/wuwaxati-girud-kesalunag-setinojamux.pdfIn PDF document text
    • http://files.kentuckycattlemensbeef.com/uploads/1/3/0/7/130776656/xonetedakiso.pdfIn PDF document text
    • http://files.eratoalakiozidou.com/uploads/1/3/1/0/131071277/5dc7eb897eab6f.pdfIn PDF document text
    • http://dopabir.pickmuseumhmongexhibit.org/uploads/1/3/1/4/131454106/vobidibul.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/1/0439/1701/7256/files/dabenuronudofiwuxotoxil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/silokudabem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/bokemegilezitakozozalaled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/atlas_v14_download_hongfire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/85848992831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0428/9439/files/react-_router-_dom_link.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/elaborative_rehearsal_involves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/46291140714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/98158850189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/roxipoxizenefosapis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/practical_biochemistry_mbbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/77058187664.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_off00006e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 5432 bytes
SHA-256: 68f8a0e350bb7dfa0bf4b8fe8c76d640d779fd390930568e386d39b3d1b6f018
font_01_sfnt_off0000811b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 10540 bytes
SHA-256: ea4185f75392a657490e0862363ddfa8fc2563014bb1dc5ff54bea16247c4271

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