Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d91323c0f675eb4…

MALICIOUS

PDF

34.1 KB Created: 2020-08-23 00:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee7966401b2c44608ae770cd67bb1a1f SHA-1: 610b6f14b4f0e486a4a87c3917699698392749ac SHA-256: 2d91323c0f675eb447be7e2b335bf15d7c9ee9b62169456ac93eca7e6c60bc7c
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for educational materials. The ML classifier strongly indicated maliciousness, and the document body contains numerous embedded URLs, many pointing to Shopify domains, likely part of a link farm to obscure the malicious redirector. The primary malicious IOC is the ttraff.ru URL, which redirects to other content.

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=sadlier+grammar+for+writing+grade+8+answers In PDF document text
    • http://files.michelehd.com/uploads/1/3/1/3/131378943/juroriwadosegarotazu.pdfIn PDF document text
    • http://files.chabadwomensprograms.com/uploads/1/3/0/8/130874379/jularagew.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/1/0430/9850/5377/files/jukupuwekukamiveli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/spinal_arachnoiditis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5596/4569/files/53040375259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/genetic_algorithm_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/83869292616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/xilitadifijobixotok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/80798724313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/sanyo_universal_remote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/nexikakotaborujozuberiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/76386933877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/excel_advanced_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/vebutedujelokedesalitifof.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_off0000469a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x469A 5616 bytes
SHA-256: e6fbb1eb446582db1392ddb10836290b4208cbec6cd5abfc5339cfbe4320780c
font_01_sfnt_off000059a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 9868 bytes
SHA-256: 902626d093697134882b39facd264f62e8c05fb6993792fde3f76e36be44012d

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