Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9125a90417d287…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 08:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06cd98526fe922a79a03b191b186f834 SHA-1: d4dd086f931c66c296762c1c733869b12fbcd554 SHA-256: 3c9125a90417d28764bdb7b523e4173eea6f4fbd5f6bf0d408ffb8d767ceda98
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure. The document body and embedded links suggest a lure related to 'Puzzle android games', intended to trick the user into clicking 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.cc/pify?keyword=puzzle+android+games
    • http://files.pointtv.org/uploads/1/3/1/1/131163780/3a264046b2607a8.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/mopaxokimukepo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/61701195457.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/79881953830.pdf
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/nugef.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/sosolabogunejipifufide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/78597538571.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2389/files/57840131937.pdf
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/golevomeno.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/reflection_refraction_diffraction_interference_practice_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/domakoganumur.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_off00006186.bin
24c4d3404a7a9471a89be3d8ac6070507f15d0b27e8c147f6d3123fa32b36461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6186 5196 bytes
font_01_sfnt_off00007321.bin
fde4e95f6232deca95d088ecb345abc4d0cda45e3500c15438ccb01ae8e10694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 10212 bytes

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