Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7113b9366658350…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 19:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c21f82408c067a408a55a7f2048ea4d SHA-1: aeac9c81dad81a5391e9b6c22d5250399706f117 SHA-256: f7113b9366658350a269c0dc7f990b0b06240b5842b41b0b6151ff0c96e16ba3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=cook%20r.%20d.%20finite%20element%20modeling%20for%20stress%20analysis%20pdf'. The document body, though heavily obfuscated, also contains this URL and other links, suggesting a link farm or phishing attempt designed to redirect users to malicious sites.

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/wb?keyword=cook%20r.%20d.%20finite%20element%20modeling%20for%20stress%20analysis%20pdf
    • http://files.newmarkethanaiohana.com/uploads/1/3/1/0/131070160/6292045.pdf
    • http://vipenori.youthcoachingfoundation.com/uploads/1/3/1/0/131070197/3223960.pdf
    • http://files.scaeop.org/uploads/1/3/2/8/132816036/firuw.pdf
    • http://files.authoramygale.com/uploads/1/3/0/7/130739949/4269807.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/bass_guitar_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/2061272534.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4602/files/jomudusonol.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/jowozuromipusofusajupok.pdf
    • https://cdn.shopify.com/s/files/1/0446/5996/6105/files/carpal_tunnel_syndrome_physiotherapy_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0440/7807/1960/files/26545956238.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/34218101708.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/kupupisebanemobadukuwif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/zowadorogulisigedokoleka.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/68138012135.pdf
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/weleselub.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_off000059e0.bin
5b47e75c8e96c7f19bbcfa355206dad3ccd577f877468648b20f38149c6b3107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 5464 bytes
font_01_sfnt_off00006c75.bin
824deba8e4d6079273166e79b2e68f638cc297767bd088a3e62c9b04fce67af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C75 10484 bytes

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