Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f8c2bd36f0fff8…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 16:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 297878399f0291b994140ff5ac9f1ac2 SHA-1: 40dec5d2523a4570be91bf76a4ca5fed08bdd4d2 SHA-256: 71f8c2bd36f0fff8cabd760c4122f6c7d07234f4717752ed7702dbef0526b260
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified as 'ttraff.cc'. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and multiple heuristics flagged the document for containing malicious redirector links and a link farm.

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=chevrolet%20captiva%202013%20brochure%20pdf In PDF document text
    • http://files.dukewesley.org/uploads/1/3/1/4/131453861/sebazodebo.pdfIn PDF document text
    • http://files.moellermasel.com/uploads/1/3/1/4/131482907/lakazigu-nagonobajasoti.pdfIn PDF document text
    • http://files.whatthefluffstore.com/uploads/1/3/2/8/132815206/9dba4b074.pdfIn PDF document text
    • http://files.montgomerychurch.com.au/uploads/1/3/1/8/131857544/gerubepe_kudeliraji_mifegovisijag.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/1/0438/5678/9664/files/72777355758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/17769004179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/rinidiwuvovozeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vekedexixerokasadoboma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/php_display_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/30413860837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/menoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/numinetaniteremigufogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/lyrics_to_little_einsteins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/livirobujokafututorobuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.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 4

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_off00006589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 5660 bytes
SHA-256: e2455996c9282e17c6cdcce6b9b848c62dc57b335f38de7d1e3531456fa1db99
font_01_sfnt_off000078c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 11008 bytes
SHA-256: 2bac09958e3243cbdea56a89e59745904d049afc73a0b7d8434fb88dc08c655e

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