Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b36c94f81f232f…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 22:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6fcedef87e01e2535a2b9f2a57fba8c SHA-1: ec12ac42dc828955f8b5db0e0894ec8c2c9e1009 SHA-256: 75b36c94f81f232f3de7b7c0180329ca47c3ee6d112d33dcc1667015959dfeed
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text related to 'video sites mp4' and includes the malicious redirector URL. The presence of numerous links, including those to benign Shopify domains and one to a suspicious domain, suggests a link farm or redirection scheme designed to lead users to 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=video++sites+mp4 In PDF document text
    • http://files.mrssmithsclasses.com/uploads/1/3/0/7/130775180/9297afcadaa6.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/1/0427/7354/5116/files/carboxylic_acid_group_chemguide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/18522788199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/29193661375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/42225272802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/81293103992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/38174978063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/ropoketejiwub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/kebexumowamoreti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/65550914088.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_off00005e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 4820 bytes
SHA-256: 235de5954aaf07dd8478a59fb5d721bfd6f8a87e9d2b8de7ca4f43dd19c70894
font_01_sfnt_off00006e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E65 10192 bytes
SHA-256: 5108fa0db99935741c5eb63c411a16d9921c6d82d7b005df464a9866d5689312

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