Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80df6626ef64f28…

MALICIOUS

PDF

52.9 KB Created: 2020-08-15 08:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab98dd7e063f9ce546e23a825c7714d4 SHA-1: 64f9279d9c5a8f696301eb45a74470d3ea57a1ad SHA-256: f80df6626ef64f283590f0a2619b10bc7288596632ff8e7a2bbe7a525876a81a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wb?keyword=politica%20economica%20esap%20pdf. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to trick the user into visiting this malicious site. The ML classifier also strongly indicated maliciousness.

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=politica%20economica%20esap%20pdf
    • http://files.kamtectools.com/uploads/1/3/2/6/132683070/6998208.pdf
    • http://files.evabogdan.ca/uploads/1/3/1/1/131164440/5be25339eedeeb.pdf
    • http://files.windycityknittingguild.com/uploads/1/3/2/7/132712323/450507.pdf
    • http://files.fittoframephotos.com/uploads/1/3/0/8/130813528/f75cb73ce7.pdf
    • http://sopisu.jenkatz-buonincontro.com/uploads/1/3/1/1/131164250/4717401.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/xewuwika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdf
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/adenovirus_enterico.pdf
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/93962716037.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/82975339210.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/wajaxediga.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/xoxetavixaxiju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/35642112824.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/79800300633.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/1/0450/3502/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009146.bin
867a922500193e527dc0853b3a261fba927b98ddac4f13758d2d71a6e426bab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9146 5208 bytes
font_01_sfnt_off0000a2e7.bin
a559946b85d175e2730f18e82c1d5c22ea31c12946128e2480f8e2ddebd3684d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E7 11016 bytes

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