Malicious PDF — malware analysis report

Static analysis result for SHA-256 990a41651cdbf301…

MALICIOUS

PDF

38.6 KB Created: 2020-08-06 21:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 454946603ada049a703ea738969c8ef2 SHA-1: ed6d645a5cf4da6c7d3cf639843f0d811b2c9e44 SHA-256: 990a41651cdbf3019c705115f82aaab5fbadaf7d11d8c5236fa2c47bb7c89a44
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cahier+de+vacances+ce1+ce2+pdf'. This URL is likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a tactic to obscure the final malicious destination. The primary intent appears to be luring users to potentially harmful websites.

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=cahier+de+vacances+ce1+ce2+pdf
    • http://files.4thoughtpsychology.com/uploads/1/3/0/9/130969885/767b9a1.pdf
    • http://files.lilyenvironmental.com/uploads/1/3/0/8/130813320/79a2b8c30.pdf
    • http://files.assertion-evidence.com/uploads/1/3/1/4/131453904/misulofoxope.pdf
    • http://xagamanur.norwicharcheryclub.com/uploads/1/3/1/0/131070872/kogejoxuxosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/rutegokasemavodidiriwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/51264780290.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/36297184735.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0645/files/11886730062.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/55289018360.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/blade_house_of_chthon_cast.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/xibiwavinatoxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/sufibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/megafinufuzuvutefuwab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/lenukakupidawipufozevuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/getavexizoxerexotuvifuna.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_off000054f1.bin
b3a7fbd560935e8c772f6b0f0e9c2d686d198a454aab72b4a406b8fd091b317e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54F1 5360 bytes
font_01_sfnt_off00006731.bin
2a4b91797646a719086d66119d6b880cf65d33b18fbdcfe3d01aba552d488acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 11616 bytes

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