Malicious PDF — malware analysis report

Static analysis result for SHA-256 0160509aa33b1ec5…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 12:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9764ae059383e9c0e5a986c2c745a9c3 SHA-1: e2a1f86466348631f30c4699d043057d64a9dab3 SHA-256: 0160509aa33b1ec59bf3a1dd5b0dc2f00f2ac569bea76bcab9a8d53e661abd18
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) identified as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into downloading potentially harmful content. The presence of many Shopify links, some confirmed benign and others unknown, indicates a link farm strategy to obscure the malicious 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=antropologia+aplicada+pdf In PDF document text
    • http://files.aubsblog.com/uploads/1/3/0/8/130813855/6264195.pdfIn PDF document text
    • http://files.staysweetnicolas.com/uploads/1/3/1/4/131453060/witilezi.pdfIn PDF document text
    • http://files.adrianahammond.com/uploads/1/3/1/8/131856949/7466497.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/1/0434/1799/3366/files/bourgeois_gentilhomme_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/lukutiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/57882085920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/67825173964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/loksatta_epaper_pune_today_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/77266558693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/16658885627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/cannizzaro_reaction_mechanism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/26508253752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/nijadatuzisamekapavusutoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/99340329246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/merajivixulawewaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/14714010712.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_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 5136 bytes
SHA-256: f08863914a58e4858e5960f342e6f02fa684ae804faad5d3d1d8b2b64973530e
font_01_sfnt_off0000722a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 10164 bytes
SHA-256: 72e91a368c162e0620c571abc56834f25eb7b22a760abd92b94ffe2ac884d316

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