Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b3aada4e0601d5…

MALICIOUS

PDF

56.5 KB Created: 2020-07-31 10:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff5b13c7c9d655f3e2809b46ba628cb1 SHA-1: 1feef4771d47f9deb35ea30e1dc3522e68f1c261 SHA-256: 76b3aada4e0601d5dcde13bba65349f8d0d3ed166d08654ef333e7ac41474663
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, specifically pointing to 'ttraff.com'. This domain is used to lure users to potentially malicious content, disguised as a PDF download. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious documents. No scripts were extracted, but the presence of numerous external links, including a link farm, strongly suggests a phishing or malware distribution campaign.

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=algebra+di+lie+pdf In PDF document text
    • http://files.rcm-asheboro.com/uploads/1/3/0/7/130775714/20fb50aa0718.pdfIn PDF document text
    • http://files.alhasoob.co.uk/uploads/1/3/0/7/130740461/tabevubibipit.pdfIn PDF document text
    • http://files.allabouttrumpet.com/uploads/1/3/0/8/130814976/bovutesudoki.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/1/0430/1642/1529/files/78472722360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/41979826166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/bejitavuvizezuwube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/soginenumimajixuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2830/6341/files/98508529026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1939/3448/files/27318680501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/mefupemuweri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2723/2918/files/tokugixak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7232/files/30726801649.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AA 2912 bytes
SHA-256: f1585241b59a1002e627af24859d8bddc2a41f5101ead6a7a290360bc82d6b36
font_01_sfnt_off0000840f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840F 4652 bytes
SHA-256: f0b496ecb2b5b77e93ed9d6477a90449309e367a171dfe50b8519a32b92e4578
font_02_sfnt_off000093e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 13464 bytes
SHA-256: e55a719fbca9bb90c4f3395d60625e8fa707ed84750d4772691ba216cdd246f9
font_03_sfnt_off0000bed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED0 16304 bytes
SHA-256: b08ea9350701f3666e8bcfc882b103c5206c3ed97749c192c3d228e82254f475