Malicious PDF — malware analysis report

Static analysis result for SHA-256 35cdd1a481d1032d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-26 07:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fcc7e453a8703f2612a51fa348414e2 SHA-1: 1286c22f74628d6cb4eea26f54a92f895843bf66 SHA-256: 35cdd1a481d1032d8b0da7413ea13248a69125ab10198fec4d4c4923c0acbfe2
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=spatial+reasoning+test+pdf+free'. The document body, though heavily obfuscated, contains text suggesting it is a 'spatial reasoning test pdf free', which is a common lure for phishing or malware delivery. The presence of a link farm further supports the malicious intent.

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=spatial+reasoning+test+pdf+free In PDF document text
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdfIn PDF document text
    • http://buxajow.marianneshows.com/uploads/1/3/0/8/130873822/6210786.pdfIn PDF document text
    • http://files.kingofcarsandcoffee.com/uploads/1/3/1/3/131398134/fazulovemeginavugu.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/1/0433/6523/6886/files/bafatatipajexiwalogewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/88520413279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7352/8223/files/komugaxag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/70083284666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/9408/9384/files/xoxosogivebajuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/6364294158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/fadonikolilizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/fovepufasokukinujumiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/91639423644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/19202469661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/21139557652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8741/9806/files/92730327577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/98567203254.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_off0000629b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629B 5312 bytes
SHA-256: 6d2701c787974d938e617d41aecc28da20c6dff08747d9b674e5176b86443d25
font_01_sfnt_off000074ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 10312 bytes
SHA-256: 2d84d6959d19b7ecfb8b9df18844e90ac28c139392d13d0523491d1af804478c

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