Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc45f60e71b1ac16…

MALICIOUS

PDF

47.3 KB Created: 2020-08-11 15:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96927da22cc432e6ab050b2910d345fa SHA-1: a6bfe1949792812be215527e422de44c42ded106 SHA-256: bc45f60e71b1ac1674b3559b817974934bcf2c9d08a05dea9a0e94714831c10c
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 indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=alcoholismo+pdf+tesis, which is presented as a link to a PDF tesis on alcoholism. The document body is heavily obfuscated but contains the malicious URL and references to wkhtmltopdf, suggesting it was generated programmatically to host these links. The presence of many Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic.

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.ru/pify?keyword=alcoholismo+pdf+tesis In PDF document text
    • http://files.stjohnthebaptistdeanery.com/uploads/1/3/1/0/131070560/6a52328b.pdfIn PDF document text
    • http://files.metalexpressions.com/uploads/1/3/0/9/130969525/4140703.pdfIn PDF document text
    • http://files.ge-solutions.ca/uploads/1/3/0/8/130874495/4310176.pdfIn PDF document text
    • http://gixura.tubaphonium.com/uploads/1/3/1/4/131407089/3643128.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/1/0437/3741/5829/files/10_act_practice_tests_mcgraw_hill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/masivilirowufuregipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/dured.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/orange_prism_ioun_stone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5200/6552/files/1531435691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/lobamixexet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8637/2246/files/nigavabixatabin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/simple_cake_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/fikapobugexasujogasamobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/65985180591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/user_acceptance_testing_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/33848420734.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_off00007bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 5080 bytes
SHA-256: c0966042fee9f5710799c6fcc4ad2c42fba62fbe23ab983853de90ef21821fa4
font_01_sfnt_off00008cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD2 10532 bytes
SHA-256: fdf90f8265e67bb8b0b170200c9d0cd694155079d2b2852bdb8a661be8e28789

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