Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4db36ea5f47bae…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 16:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0763078c834c8f647119edd99150b54f SHA-1: 3745164a2d4211ab77e27ccb64ea27cdc37f3696 SHA-256: ee4db36ea5f47baee30ce8df0ff2dba999565f27b4a67b96ed61ddec2ce1624e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=couch+to+5k+bbc+pdf'. The document body and embedded links suggest a lure related to 'Couch to 5k' to entice users to click on the malicious URL. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=couch+to+5k+bbc+pdf
    • http://files.finderskeeperscafe.com.au/uploads/1/3/1/3/131398134/xibokesedi.pdf
    • http://files.louiseneaveportfolio.com/uploads/1/3/0/7/130775434/gisekoduparorubek.pdf
    • http://files.omygoddess.com/uploads/1/3/2/6/132682882/xagenirowavevosip.pdf
    • http://vawud.patriksoderstam.com/uploads/1/3/1/3/131384429/df9564c6415f.pdf
    • http://gigamo.eyeholejig.com/uploads/1/3/1/6/131606165/fbe343e38846a8.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/doxetunazopeguxulizun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/dogumusiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/ds_rom_to_cia.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/fuxadebub.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/complete_tutorial_of_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/luninuwewegetag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/59507559978.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5265/files/c_programming_basics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/20470093567.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/city_of_heroes_corruptor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006947.bin
30625bdee8c7807ed3affdeaae6bd4832ce0ce1d78a5bdb0ff6b88775949fbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 4688 bytes
font_01_sfnt_off00007946.bin
2eaa0b0a6a1c75b3ecbf17db212fbf8d1520bc4a406356c87a85468179129c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7946 10384 bytes
font_02_sfnt_off00009cb5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB5 4324 bytes

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