Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94ae5e6f6e1764d…

MALICIOUS

PDF

112.4 KB Created: 2020-08-24 18:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8c96defb6d2e934591096e03ad8a611 SHA-1: 7c175bd3a1a7265ef185d37c5ce7882f102a779d SHA-256: d94ae5e6f6e1764d54f1b74ecd1efd36a348dea5b5f934c1a8adb802f40769c3
152 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, specifically pointing to 'ttraff.cc'. This indicates the document's primary purpose is to redirect users to a potentially harmful destination. Additionally, numerous other PDF links were found, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=article+format+class+12th+cbse
    • http://wagilax.george.work/uploads/1/3/2/7/132710797/efe7fe5.pdf
    • http://panenapa.lisabaudry.com/uploads/1/3/0/9/130969724/nizevomidarinoloma.pdf
    • http://files.complaintadvocates.co.uk/uploads/1/3/1/4/131437311/paliralozexa_jokor_rodubefo.pdf
    • http://files.checinc.org/uploads/1/3/2/3/132303226/zivudusak.pdf
    • http://files.thencga.org/uploads/1/3/1/4/131438137/wujagozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/35003074843.pdf
    • https://cdn.shopify.com/s/files/1/0444/2416/7591/files/binebitogonibijilidobe.pdf
    • https://cdn.shopify.com/s/files/1/0439/2606/1224/files/56438404580.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/77302626700.pdf
    • https://cdn.shopify.com/s/files/1/0461/1227/6644/files/solving_absolute_value_equations_review_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/23506212209.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/44329232475.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/xagubalojebuzatubi.pdf
    • https://cdn.shopify.com/s/files/1/0458/6573/0201/files/cell_phone_advantages_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/kafevevekafavifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/42611475078.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_off00016899.bin
97500a7c3ff2706989fb97ace8e2cab9824ddc3b8c43da868e2d4c131cd9c084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16899 5432 bytes
font_01_sfnt_off00017af0.bin
29feea82ff5b1a286fcaa759b8c3aae7a93a7ce34256bfeef66eb203921b04b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AF0 10428 bytes
font_02_sfnt_off00019e82.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E82 16164 bytes

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