Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4399dc2b10ea11e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 23:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d73ba9159440f4ad1f946dcbcf19590 SHA-1: d87f919da500c9a1fc24f37f3b49c0de9ed00cdc SHA-256: e4399dc2b10ea11e7e407be8bded6ce87f5e0334a0a8899138bcb5848ec42e1b
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the same redirector URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=sensors+and+actuators+in+automobiles+pdf In PDF document text
    • http://fomizax.yyceliterenovation.com/uploads/1/3/0/9/130969358/gerafapexosas.pdfIn PDF document text
    • http://files.oaclassical.org/uploads/1/3/0/9/130969184/visap.pdfIn PDF document text
    • http://files.latreiarollershades.com/uploads/1/3/1/4/131453595/aaa4ae.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/1/0434/6321/3209/files/69467093793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/43313068119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/38563937309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/vugegaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/posaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/zowidetesorebitirewiroves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/movies_coastal_grand_mall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/angularjs_6_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9553/9368/files/riwowugawepofaduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/tisemuxixuzizosuloxime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/wimegadomaxeposijiw.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_off00006471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 5544 bytes
SHA-256: f3c55aaa2cc63eb7f8ad8cb65b4aac9d4f7007ec9ffb918e2616605d25334bbd
font_01_sfnt_off00007728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7728 10076 bytes
SHA-256: 9755f8fb50762572f01eb0c38974d72b9006979a69d89ae42633f98d86680565

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