Malicious PDF — malware analysis report

Static analysis result for SHA-256 32834b31a588bafe…

MALICIOUS

PDF

45.2 KB Created: 2020-08-16 12:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b63ed3ce4dfdb2164a177acc5eb7afd1 SHA-1: 4a9b2c078f54dafcd0c6d25a8d8ba0a8b8b0c42d SHA-256: 32834b31a588bafe412b101fd358bc76318fa21369570dd97a5c3337429d9348
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/wb?keyword=attach%20pdf%20in%20word%202010'. The document body, though heavily obfuscated, also contains this URL, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious. The presence of many external links, including to Shopify domains, indicates a link farm strategy, likely to obscure the ultimate malicious destination.

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/wb?keyword=attach%20pdf%20in%20word%202010
    • http://files.longbacken.com/uploads/1/3/0/7/130776536/6991455.pdf
    • http://rutibe.factorywarrantylist.com/uploads/1/3/2/8/132815176/6796783.pdf
    • http://files.playthecellowithus.com/uploads/1/3/1/4/131482991/nepod.pdf
    • http://files.raedelisle.com/uploads/1/3/2/7/132741348/5326950.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/kiwerokijitu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/cedula_de_identificacion_fiscal_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/9353471367.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/adverbs_of_frequency_exercises_islcollective.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/azur_lane_cognitive_chips.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/89815163143.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/73392862205.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/42963459004.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/stylesheet_directory_uri_wordpress.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/makuwijivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/22544069263.pdf
    • https://cdn.shopify.com/s/files/1/0443/9467/6390/files/52552118480.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_off00006619.bin
4fe67beefd6bbc02fb93f336de3b6db1ba3c9e31ef1669855cfda695c63150de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6619 5112 bytes
font_01_sfnt_off00007777.bin
f4701e5d0e765092ec933e7b5d9fb6cdf16adaa35e0986605565c5a723565e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 10112 bytes
font_02_sfnt_off00009a05.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A05 4324 bytes