Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba028e371b6d17b…

MALICIOUS

PDF

45.8 KB Created: 2020-08-01 00:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0289dc40196f6981f0d62f1aee4604 SHA-1: 30f434848f8358965a68258b5d48231704eb1552 SHA-256: 9ba028e371b6d17b6ca875486aa7c9572fb981a9cfb5dea145dfb7493086e6c7
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 'ttraff.cc'. This link is presented within the document body, disguised as a resource for a 'Beck scale for suicidal ideation pdf'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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=beck+scale+for+suicidal+ideation+pdf
    • http://files.louisabrownholistictherapies.com/uploads/1/3/0/8/130874458/5292551.pdf
    • http://files.mysecretmuse.services/uploads/1/3/0/7/130776099/vusetagid.pdf
    • http://files.outofthegraywa.org/uploads/1/3/0/7/130775822/f0abb910996796.pdf
    • http://files.cobilconnect.com/uploads/1/3/0/9/130969853/6ea8d66a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/71233858842.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/fuwabiguwupobugiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/93794708856.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/92505104499.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/18910824800.pdf
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/3468406003.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/jafanijixivoxedijidukit.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/discord_how_to_stream.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/61236119302.pdf
    • https://cdn.shopify.com/s/files/1/0439/3048/4904/files/how_to_check_current_tensorflow_version.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/
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/712338588

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007517.bin
f1f92c554e62a82f531c3564689bb4baff3119fc9ec9c2c105088708a8dcabdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7517 5260 bytes
font_01_sfnt_off00008716.bin
b1360ae05a695c6a1655758f223bfec8cce39cc4beeda5883efc7e73c56bc8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 10240 bytes

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