Malicious PDF — malware analysis report

Static analysis result for SHA-256 a309ed403c988e06…

MALICIOUS

PDF

35.1 KB Created: 2020-08-01 08:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae528450b40c096ad0af7ba7ac6e597b SHA-1: 425ab1923f0f337fb4c1d0d9a94fc1ae3d20b8b8 SHA-256: a309ed403c988e0656acec9004907666240bdacb5d79c4b1ac1a6db043a092ae
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=tnt+on+fios'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to a Shopify domain. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links.

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=tnt+on+fios
    • http://files.hogutah.com/uploads/1/3/0/7/130775431/rarepiwok_revexox_julemupu_merejop.pdf
    • http://files.queencityproam.com/uploads/1/3/1/6/131637136/9bc4867c9d70.pdf
    • http://files.hbade.com/uploads/1/3/0/8/130815437/4457380.pdf
    • http://files.timchatman.com/uploads/1/3/1/8/131872054/4c9dfe35.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/31830496732.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/english_phonetic_transcription_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/gamemedunasupifulatini.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/bidutumifenemavope.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/15496182671.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/82406646686.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/81128215854.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/27789236569.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/55835189573.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/94685179241.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/soxatedotexasepepuxutidum.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_off000043de.bin
91cf960e23a639faf7cca420a29807e98748c97d66479173b2515f57e0d01649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43DE 4040 bytes
font_01_sfnt_off00005192.bin
e43fe8191211f0e867ee08775402363240f5d5845e7a52b57f5dda3c84b74782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5192 9380 bytes
font_02_sfnt_off000071b8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 4324 bytes

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