Malicious PDF — malware analysis report

Static analysis result for SHA-256 435e4bcf6b887999…

MALICIOUS

PDF

47.1 KB Created: 2020-08-01 15:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66a6d7c73b64effbf47436881df8b433 SHA-1: dc24fe14e961330666c6d031ce7b2588a2444886 SHA-256: 435e4bcf6b8879992ac17f85f904c12d15d68edfbbc275d77f2956ed5667d884
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to a "no credit check cellular phone" lure, which is consistent with the malicious redirector URL. This suggests the document is part of a phishing campaign 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/pify?keyword=no+credit+check+cellular+phone
    • http://files.londontoursatnight.co.uk/uploads/1/3/0/8/130813645/7311200.pdf
    • http://files.bakedwithhearts.com/uploads/1/3/0/9/130969461/8cd32.pdf
    • http://files.channelcenter9.com/uploads/1/3/1/3/131383860/5860522.pdf
    • http://files.reneesgourmetpizzeria.com/uploads/1/3/1/3/131380299/9280124.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/lagililiteganifiliwafu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/47221734365.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/fewedemalidefoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/14719544964.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/84312867058.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/72357229364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/how_old_is_my_minecraft_account.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/32952523917.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/95405830339.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/91256841386.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_off00007b0e.bin
13dcf44310351c1d4b0a7f90ad8ae71332b125133d57bc00056b7b26fa7e17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0E 5016 bytes
font_01_sfnt_off00008c18.bin
e16e2942c82767045ec0ccb011ad49ce1497e0dc2f54cfd1163fc8df58f22bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C18 10412 bytes

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