Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef29a6d8612a041…

MALICIOUS

PDF

49.9 KB Created: 2020-07-30 07:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49632c3eab3adee12821836f6296ce47 SHA-1: 38863e56206afbefa81a0a725b401b99121c4014 SHA-256: 3ef29a6d8612a0414da6d155ca34437787d757ab58718bbeb7ef5a79e4ea2d51
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with a critical heuristic firing for a PDF link farm. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to academic documents, suggesting a phishing or social engineering attempt.

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=ccs+university+meerut+date+sheet+2020+pdf+download In PDF document text
    • http://files.winereviewsbyjacob.com/uploads/1/3/0/7/130776462/wopaja.pdfIn PDF document text
    • http://files.beeffoundation.org/uploads/1/3/1/6/131637034/dadigaguxa.pdfIn PDF document text
    • http://files.arthurkeeganbole.com/uploads/1/3/2/6/132695586/2da843.pdfIn PDF document text
    • http://files.feughdeewest.com/uploads/1/3/1/4/131454986/9028876.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/1/0433/0687/7080/files/ruwofejimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/10444197972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/34844991019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/73316202683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7458/3702/files/67717158273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/wurutavajepevugasox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/552956366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/5315536492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/lamasukutixujinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/67872369111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/xakerasigigixagidabesobuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/66788042370.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_off00008287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8287 5828 bytes
SHA-256: 78f3794677fffa8e4f8fdae52e249de4d31e184884523a469dc2846d4fbff391
font_01_sfnt_off00009645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9645 10768 bytes
SHA-256: 4381db0296f8b2a56466e09d9761e4937a35d24b16a6e2331904f9ac77da1e61

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