Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8b28f9fdced1ac…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 14:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1c90a5146f4611af444b0e3a61e3fb6 SHA-1: 39b2862de3ad48277fef577545480abcf8c78bd6 SHA-256: 2a8b28f9fdced1ac4839721157a2fad17846592376e1150a40784219086d3488
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=boards+and+beyond+2020+pdf'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=boards+and+beyond+2020+pdf
    • http://files.corzanerottweilers.com/uploads/1/3/1/4/131437924/wuzezokokamelazoduz.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • http://files.sharecroppersfarm.com/uploads/1/3/0/7/130739313/potupilexo-feganopas.pdf
    • http://files.thewildwaycoffee.com/uploads/1/3/0/8/130873791/fajaxilirifew_nivaxivopafo_fivadimunor.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/9433422715.pdf
    • https://cdn.shopify.com/s/files/1/0435/4477/2757/files/42080368207.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/48768716043.pdf
    • https://cdn.shopify.com/s/files/1/0437/3908/7002/files/bukape.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/pufujomizapujuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/lepaxapipifezipodugelon.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/94526170124.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/98000597290.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/57306742396.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/21743616966.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_off000060b2.bin
d9859077693192a072ecee2cb05c574b24ca5df7c44758a4ae4a82d5326be945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 5568 bytes
font_01_sfnt_off000073ae.bin
f06fce4a042dd0486d4846d216219bbf1ec01e21cb4929ace5f3f14fdf369687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 10224 bytes

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