Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4eb37cdacfa6ce…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 17:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e76b80a3525710b4f87504873044a34 SHA-1: 68b54900e0d5cecca147338a1cba191fbc5215d0 SHA-256: 2a4eb37cdacfa6ce063dcd7728f77879d9ea001ee3187eb1ea249dd16bc3b268
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting the document is designed to distribute traffic to numerous other PDF files, likely for SEO manipulation or to host malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=callus+formation+bone+remodeling.

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=callus+formation+bone+remodeling In PDF document text
    • http://files.hspvanhs.org/uploads/1/3/1/4/131407194/bibapibeberaguf.pdfIn PDF document text
    • http://semejelit.thehypnosistemple.com/uploads/1/3/1/6/131637814/mimokofum.pdfIn PDF document text
    • http://files.rabbidweck.com/uploads/1/3/1/0/131070481/b0f3e3a3.pdfIn PDF document text
    • http://fiwitibok.shindigpublishing.com/uploads/1/3/0/7/130775388/1906585.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/1/0439/3802/1544/files/70061660505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7730/files/algebra_math.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/mevosonirosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/aha_new_hypertension_guidelines_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/19404233378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/xijamagizud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/42450305780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/nsfw_discord_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/hard_short_riddles_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/crm_software_free_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/11175623574.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 8

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_off00005b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B24 5272 bytes
SHA-256: 6eb440c3837f1629f89417eb588e079ba95584329c1de2d642dbabf31e99dabe
font_01_sfnt_off00006cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 10340 bytes
SHA-256: acf2d087ef7e8fb0a48f8e802513cd5bd1bc8bacd05d133cb74aeb58aa92163c

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