Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff55a9bb82192b1…

MALICIOUS

PDF

39.2 KB Created: 2020-08-27 17:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aee9a671c8f8ef960fc2cc19b8afd5ee SHA-1: 3443fa76c28c41d2ea6475134804b4fce880a777 SHA-256: cff55a9bb82192b16326a2443c398978b226a44158a1d8f0518aec6e3a2a91ff
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=lance+truck+camper+guide'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the embedded URLs and the redirector link are strong indicators of a phishing or malware distribution attempt.

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.ru/pify?keyword=lance+truck+camper+guide
    • http://fezenagam.lkradio.online/uploads/1/3/1/3/131380845/makiwedebakez.pdf
    • http://files.fairhavenarts.org/uploads/1/3/2/7/132740564/fa84362.pdf
    • http://files.sproutingfarms.org/uploads/1/3/0/7/130739910/2268799.pdf
    • https://cdn.shopify.com/s/files/1/0461/7545/3338/files/common_application_essay_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3205/files/tokor.pdf
    • https://cdn.shopify.com/s/files/1/0461/7306/1273/files/aai_tamil_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/handbook_of_psychological_assessment_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5397/files/12913636760.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/likovijejuvupirezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2411/3049/files/wow_tbc_priest_leveling_guide.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_off00004e81.bin
ed7f2c3999ba4a8d451f1e17f8a959b70332826dbf18c949e6f4b8831cc2cfbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E81 4960 bytes
font_01_sfnt_off00005f45.bin
610076d25684653aa3c142001a67a991cb2393be7983701b0b89c5c26b2abeb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 10192 bytes
font_02_sfnt_off00008222.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 4324 bytes

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