Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e3134cddadba5c…

MALICIOUS

PDF

33.8 KB Created: 2020-08-02 16:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0db613817e4b86fb106d945ade20937c SHA-1: b1d76e046cc1e8a7c113ca01404e274eef159759 SHA-256: a2e3134cddadba5cb3f9b99390ad09cc598c59d98dbf5ea44b9719ebd415adaf
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=worcester%20bosch%20boiler%20manual'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm SEO tactic to obscure the malicious redirector. 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.cc/wb?keyword=worcester%20bosch%20boiler%20manual In PDF document text
    • http://files.remotedatabaseadministrators.com/uploads/1/3/2/6/132696030/ef0c0277d72b07.pdfIn PDF document text
    • http://files.janinerosenberger.com/uploads/1/3/1/4/131437504/4d3deb76c5.pdfIn PDF document text
    • http://files.4energia.com/uploads/1/3/0/8/130814706/mututafaregilur.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/1/0430/3316/5986/files/14037939043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/punegotanolaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/72065134665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/lemofabagelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/88829805176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/27309691389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7853/3788/files/votusonojuzosubuveganes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/nabiwoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/terir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/46133208958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/67815267469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/chinese_calligraphy_font.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 6

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_off00004782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4782 5192 bytes
SHA-256: 5a8dbb5a38e78f72fc0238f9de2c6a3d02e4d4b35022b03935083ec666a787e1
font_01_sfnt_off00005907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5907 9860 bytes
SHA-256: 8ae274e7427d815ea0a4ba029729f21762d1dafea06b0dc8e04622263bbb65b2

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