Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a55bc9a6195d8b…

MALICIOUS

PDF

44.2 KB Created: 2020-07-28 20:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaed3b48dadd391bc7ac0beffa1704be SHA-1: 292e250aab1c62d56db023b8a38d58b21e2fcc86 SHA-256: a2a55bc9a6195d8bf364ec70d19d687f4bc145739ca3b497110e1585098d887d
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a government cost estimate template. The link leads to ttraff.ru, which is known malicious infrastructure. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure the final malicious destination. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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/pify?keyword=independent+government+cost+estimates+template
    • http://files.teamlowa.com/uploads/1/3/0/8/130814588/voxefedurodona-zifeniwudetes.pdf
    • http://files.disneyland4ever.com/uploads/1/3/2/6/132695432/6950170.pdf
    • http://files.soulblisshealingcentre.com/uploads/1/3/0/8/130814121/dojaxapugivefepate.pdf
    • http://files.mrflessa.com/uploads/1/3/1/3/131397946/zabif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/74325110800.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/80807707826.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/xikitibelitifawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/dilakumezuminofuwowa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/pozitutidewuregezoma.pdf
    • https://cdn.shopify.com/s/files/1/0440/7014/2117/files/39806805244.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/78245348473.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/49227050784.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/1/0430/5456

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007063.bin
fb21c92c7fa960cdf90321470bcce44a05b32905bac706115ae10c4fc138413d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5180 bytes
font_01_sfnt_off000081e2.bin
7797d8cb58bbdbfdde4846097d721687f1376adcc79ae8a9f91cc1df96f2340b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 9888 bytes

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