Malicious PDF — malware analysis report

Static analysis result for SHA-256 204933eba9df9e2e…

MALICIOUS

PDF

44.8 KB Created: 2020-07-31 06:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9cdb6e845b394ea8c8642edfb5e77c4 SHA-1: 576b11c064679550a045a3bf85d1295f4362fded SHA-256: 204933eba9df9e2e0c3a5fe85e5d6379a5530d73bd97d828ae1698e8e6641bbc
150 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.ru'. This URL is designed to redirect users to malicious content, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Payment slip format pdf', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, further indicates a link farm strategy 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/pify?keyword=payment+slip+format+pdf
    • http://files.levusboutique.com/uploads/1/3/0/9/130969935/pivitenekarapevoba.pdf
    • http://files.gwatfldc.org/uploads/1/3/0/8/130814132/f1d88.pdf
    • http://files.jennytownsendlcsw.com/uploads/1/3/1/4/131453749/9313784.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/65986448048.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/setiloxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/38773792611.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/tigovupekesovivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/80971665788.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/vidaduxodakum.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/54335188455.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/gavobaver.pdf
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/83763021361.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/13372025890.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/65227038303.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/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007220.bin
c6e717b92dbda45f590bb0ac6c7735471fc8bc12d83c96c7b5a13dbd10f3d7f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7220 5076 bytes
font_01_sfnt_off0000834b.bin
9af1a3c394ec0f251149aeabfc117a4a6d6efcb4cf9e9378f7b98a1aa998bb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834B 10252 bytes

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