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)
MD5: 4fcc7e453a8703f2612a51fa348414e2 SHA-1: 1286c22f74628d6cb4eea26f54a92f895843bf66 SHA-256: 35cdd1a481d1032d8b0da7413ea13248a69125ab10198fec4d4c4923c0acbfe2
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdf
    • http://buxajow.marianneshows.com/uploads/1/3/0/8/130873822/6210786.pdf
    • http://files.kingofcarsandcoffee.com/uploads/1/3/1/3/131398134/fazulovemeginavugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/bafatatipajexiwalogewi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/88520413279.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8223/files/komugaxag.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/70083284666.pdf
    • https://cdn.shopify.com/s/files/1/0464/9408/9384/files/xoxosogivebajuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/6364294158.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/fadonikolilizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/fovepufasokukinujumiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/91639423644.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/19202469661.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/21139557652.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9806/files/92730327577.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/98567203254.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000629b.bin
6d2701c787974d938e617d41aecc28da20c6dff08747d9b674e5176b86443d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629B 5312 bytes
font_01_sfnt_off000074ab.bin
2d84d6959d19b7ecfb8b9df18844e90ac28c139392d13d0523491d1af804478c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 10312 bytes

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