Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd22bf1c2fe494a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 07:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 871020ecec87fd3a1360d8aae5630b9a SHA-1: 1c11e1708b46f8d12f5a94bd6de6fd6e59632566 SHA-256: fbd22bf1c2fe494a26f3e74061574a8b014e76f95eb3cb30a9c53d55104d28d5
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a link to a known malicious redirector at 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The document body contains garbled text but includes the same redirector URL and a reference to 'game offline android terseru', suggesting a lure. The primary attack pattern appears to be SEO manipulation or hosting malicious content via a large number of external 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.com/pify?keyword=game+offline+android+terseru In PDF document text
    • http://files.challengerelementarypta.com/uploads/1/3/1/4/131406735/8538177.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/1/0440/6041/0006/files/foborinaxogaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/41245369217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/vuteburepefuvesinedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/15675821873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/bujuneta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/tonilaxubetun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/engineering_drawing_book_nd_bhatt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/siletozubifupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/nutatojotusewiganomapuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/4696540620.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 2

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_off00006595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 5084 bytes
SHA-256: e9e7f9e2c521ba9d4ff17a5ab45e7486892d4191b37620441842f73af28821f5
font_01_sfnt_off000076cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 10224 bytes
SHA-256: 712f1e7251cbcc5b86494e5f6dfa632a1afe4d5170c6080301208e7b083e37b9

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