Malicious PDF — malware analysis report

Static analysis result for SHA-256 641edbd1be74f216…

MALICIOUS

PDF

50.7 KB Created: 2020-08-07 16:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54b01ac8a7eb9789d5dca1833bc4f4a6 SHA-1: 62c8360255ee97376829da2b1bc39831485b3e87 SHA-256: 641edbd1be74f2162deeb66d7bbd4842948c5f771947dfd3d1bafd8c4fb6785d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs, suggesting a link farm or SEO poisoning tactic to lure victims. The ML classifier also strongly indicated maliciousness.

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=baroque+art+movement+pdf In PDF document text
    • http://files.pgtaosa.org/uploads/1/3/0/7/130775520/32560125e006306.pdfIn PDF document text
    • http://tifuzejiv.fritzcornmaze.com/uploads/1/3/0/7/130775320/1727470.pdfIn PDF document text
    • http://files.carpediempublishers.com/uploads/1/3/1/3/131380213/8438239.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/1/0430/9162/4096/files/39380219250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/bapivuvevog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2038/4416/files/college_football_injury_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/bufazezezodejajivuwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/magidoduwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/tuxaruvaribumudakawone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2038/4416/files/setting_up_localhost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/10003139382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/30737127792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/xefedidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7106/5503/files/azatioprina_y_embarazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/8895292979.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 1

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_off000089ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FF 5212 bytes
SHA-256: 57ce10dd95e3856775f1cd61bf5041603033560eee76dfbbb64e41b11141c736
font_01_sfnt_off00009bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAE 10032 bytes
SHA-256: 066a49375eac62521b07d51f754167af2e114b32ae65959408fc3120145256bf

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