Malicious PDF — malware analysis report

Static analysis result for SHA-256 4782469c7cfb8939…

MALICIOUS

PDF

44.2 KB Created: 2020-08-16 15:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a498cf080ebb3ef2f6d178babb16d087 SHA-1: 1aa26f706dd8fa76c591af30d418065fc9d8e659 SHA-256: 4782469c7cfb8939b199ab7dbaea851024e1033d01ab0cd086769bb51714dccf
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This suggests the document is designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of malicious intent.

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=game+bandar+ceme
    • http://lelof.bbmjyouthcamps.org/uploads/1/3/2/6/132695584/3301410.pdf
    • http://files.voltaassociates.com/uploads/1/3/1/6/131636903/bovomozeluna.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/40731857070.pdf
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/kometi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/61108176150.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/jawukini.pdf
    • https://cdn.shopify.com/s/files/1/0440/8259/3957/files/kopukugovajifuvonuwibewu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/judea_pearl_causality_models_reasoning_and_inference.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/budukokalilujoxaxajuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/befave.pdf
    • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/muwumetemigon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8504/files/brand_awareness_and_brand_image.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_off00007064.bin
c76225f0eb97e9dad634c11e6000801fa49cd67be733f18031eed8eaae52651e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 5048 bytes
font_01_sfnt_off00008170.bin
12da494b22992477637f9f12b9cb0db7da53175888ad16d727735b63127c1822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 10140 bytes

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