Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dda44ccfc2f485f…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 01:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ad406729e2332e7eb51e53a52c3bb7d SHA-1: ea8749c926600999bf4af9e26c14cad347c4cb8a SHA-256: 9dda44ccfc2f485f31ab2e9d4beb3e9f40a7038a5abe616f09f93e2f87117d38
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'interview questions'. The primary malicious link identified is https://ttraff.ru/pify?keyword=basic+strength+of+materials+interview+questions+and+answers+pdf, which is likely used to redirect the user to a malicious site. The presence of a link farm further supports the malicious intent.

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=basic+strength+of+materials+interview+questions+and+answers+pdf In PDF document text
    • http://jotexap.hillsideumcgoffstown.org/uploads/1/3/1/6/131636725/2688598.pdfIn PDF document text
    • http://xukut.alphaeta42.com/uploads/1/3/1/6/131606349/3463050.pdfIn PDF document text
    • http://files.bodhi-australia.com/uploads/1/3/1/3/131398374/tomibalegonovotew.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/1/0435/0207/6070/files/https_remote_qvc_com_ess.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/student_tardiness_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3187/1139/files/rebitofizodusisuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/armies_of_the_lord_of_the_rings_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/mesiloleranepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/86429069568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/govejowexiwefexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/56399526005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/sumuridarugowoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/tudemujatepetuvivaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/tewisevogugizadir.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_off00006098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 5896 bytes
SHA-256: 95b41ccabeb80c49e0ec9c4c8b6ce6cd372c120c154a9722043c0ae67b82e297
font_01_sfnt_off0000748b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748B 9412 bytes
SHA-256: cf8b3580fe21782d7c0dcd44f2a606a9bd1b4d7aaad9a2819e5f1cd670f0d225

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