Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7386d71b9c7aa0…

MALICIOUS

PDF

32.3 KB Created: 2020-08-15 01:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b76fcfc0552b59f99a0d82a491230d1a SHA-1: b9230f3a221a3204847fbf4507018710f02bdfa5 SHA-256: ad7386d71b9c7aa02b6b4980411733d0505a118e94b6f4ba7f537e4331ec4b8d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains references to academic material and lyrics, likely serving as a lure. The presence of multiple Shopify-hosted PDF links suggests an attempt to create a link farm for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=integrated+mathematics+2+answers
    • http://files.rogerthayden.com/uploads/1/3/1/3/131379833/8718242.pdf
    • http://files.rockdale-newtongenealogicalsociety.com/uploads/1/3/0/8/130814225/nukuropofinemaji.pdf
    • http://files.artbymkd.com/uploads/1/3/0/8/130873979/6244392.pdf
    • http://files.paulabeasty.com/uploads/1/3/2/7/132740930/8093100.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0141/files/strong_lyrics_kanye_west.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/facebook_login_page_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/javascript_ajax_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/mopose.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/visotevizilebotulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/zubub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/7680364474.pdf
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/vegudoguwetejum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2251/5351/files/82940390136.pdf
    • https://cdn.shopify.com/s/files/1/0433/7657/4620/files/mba_aviation_management_syllabus.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_off0000432c.bin
398b07720da7ac7bf8bea4bd4fb29e9f81e6a17b0f0ef2592919d5e0eac5245d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x432C 5484 bytes
font_01_sfnt_off000055b1.bin
ad1ff5b45637eccf257719cbe888f3abc85186c0924a4ffbd82c598b1457c96f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B1 9144 bytes

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