Malicious PDF — malware analysis report

Static analysis result for SHA-256 961a763b88e00afc…

MALICIOUS

PDF

43.6 KB Created: 2020-07-30 17:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67fe6b723e9801474ceb65860465cb23 SHA-1: b93ea8a9884982ca88b0b6b205029fe77f250cef SHA-256: 961a763b88e00afc0333426de44183ab4c146d40acc4ce9342029f631e24b076
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to PDF manipulation and the authoring tool 'wkhtmltopdf'. The primary attack pattern involves luring users to malicious infrastructure via these links.

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=x%25C3%25B3a+1+trang+trong+file+pdf+online In PDF document text
    • http://files.puddlesandrainbows.org/uploads/1/3/2/6/132682685/gasijarelejonabuga.pdfIn PDF document text
    • http://files.delphilibrarydigital.com/uploads/1/3/1/4/131455328/wasozasolog.pdfIn PDF document text
    • http://files.championsignsllc.net/uploads/1/3/0/7/130775510/5315619.pdfIn PDF document text
    • http://files.watchwordediting.com/uploads/1/3/2/6/132681769/9563663fdf7264a.pdfIn PDF document text
    • http://files.xangrey.com/uploads/1/3/2/6/132695428/80e19d1b4fd20.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/1/0431/8245/7000/files/75228151095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/78785008076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/pomekekulab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/xesabesazajibidurawelilaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/17315089832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/wosefefawolefupemilupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/3689350753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/neregiwifujogenibivifavup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/dexadabazopugone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/rozududojuxan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/96269408679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/8829748989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/5941235649.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_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 4984 bytes
SHA-256: 4aff5f40bdd0a33c24b17d95cda30f9c90a89f8733064bb0a14779e7fdc72ec9
font_01_sfnt_off00007d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2B 9900 bytes
SHA-256: 8c1fa66953c4d1d79cbe13f26b083662675281aa45377c54803454d9630b5e19

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