Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bd321bc835e3e2…

MALICIOUS

PDF

45.5 KB Created: 2020-08-26 10:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef73d7f4c1d84706931f19ad227083c SHA-1: 26cb910b2a16f1f814da192bc09fc5403fb6c085 SHA-256: f5bd321bc835e3e2f25b0aa36c890beb83911585dbf474009c9d650d7b1f3529
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru, which is used in conjunction with a PDF SEO link farm. The document body, though heavily obfuscated, contains the string 'Drivereasy key numaras' and the malicious URL, suggesting a lure for software cracks or keygens. The numerous embedded links, many pointing to Shopify domains, are likely part of a link farm to improve search engine ranking for malicious 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=drivereasy+key+numaras%25C4%25B1 In PDF document text
    • http://files.paternosterproductions.org/uploads/1/3/2/6/132681647/1132609.pdfIn PDF document text
    • http://fesemo.carolchallis.com/uploads/1/3/2/7/132710575/nanugu.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/1/0437/5497/9477/files/is_subnautica_a_horror_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/70931224741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/fuwev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/sodium_chloride_certificate_of_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/case_files_general_surgery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1478/7996/files/anganwadi_form_download_mp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/depafopamix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/modafite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/62713114313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6756/3429/files/37980488528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/bodbot_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/86171795964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/40296313748.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_off00006a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 5056 bytes
SHA-256: e6a92d8430701e44e8e63e5ef146269c56d781838ff64554e8a7de3f97362176
font_01_sfnt_off00007bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCC 14060 bytes
SHA-256: 07ab780dc557442438a4e6cdddc4daf3010aac7565643642494c622e1c09066c

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