Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa41d83848178ea…

MALICIOUS

PDF

32.7 KB Created: 2020-08-14 13:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d33ea2421b24b4f1890874b17a23a4a7 SHA-1: 167be261652cf9f8deea3098a593e91a94512bb8 SHA-256: 9fa41d83848178eaeacba939a02a791ac7b2b005fa79dcdcb0e04215ddc6f91d
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, also contains this malicious URL. This indicates a likely attempt to lure users to malicious sites, potentially for phishing or malware delivery. No scripts were extracted, and the primary malicious activity observed is the link farm and redirector.

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=sir+francis+drake+timeline+worksheet In PDF document text
    • http://lifululet.sunshineandraindrops.com/uploads/1/3/2/7/132740978/9581297.pdfIn PDF document text
    • http://files.littlelovesbaking.com/uploads/1/3/0/7/130775308/2797673.pdfIn PDF document text
    • http://files.kathleenflanagan.ca/uploads/1/3/0/7/130776484/cd7a2a4.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/1/0433/7542/7735/files/46308624019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/30516797783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2809/3850/files/webmail_covad_net.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/99895401282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/mahalaxmi_september_2020_marathi_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/33116612732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/35206639428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4431/5041/files/40773127654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/galoxik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/52845022794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/zasoxipumizarili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/79320519657.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 4

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_off000044fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44FB 5520 bytes
SHA-256: da51c28975974e7c11ba6d5ab764cfc699636ec88499cd037bc007e36e205318
font_01_sfnt_off00005799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5799 8816 bytes
SHA-256: da6d85ecac430dae30353a9aba15bbc99508af4c576d56f9e0a94b4c0abe187f

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