Malicious PDF — malware analysis report

Static analysis result for SHA-256 7169ce75301af1fd…

MALICIOUS

PDF

38.2 KB Created: 2020-08-23 02:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c379968c9bd8b51c0d66d1cde279b574 SHA-1: 5917016305ef57a53619b09552fec878ef471013 SHA-256: 7169ce75301af1fdffc2396fca19ffbdf303d7b4b4c8a09c9b9bd79a835c4bc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malicious redirection scheme.

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=naa+autograph+hd+movie
    • http://kagegu.michiganfingerstyleguitarsociety.org/uploads/1/3/1/4/131453850/5071872.pdf
    • http://files.threegirlsquilting.com/uploads/1/3/2/6/132682655/kuloli-bukixupimuj-ganupusu-lewosalu.pdf
    • http://files.sandrabekvalac.com/uploads/1/3/0/7/130740483/kuniwuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/94946829839.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/password_keeper_for_android_phones.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/7709938810.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sutapazuvonovojikujabera.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/82029544211.pdf
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/pamuparikufibekeboziso.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/xifosajebatawakad.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/komotuvapepulebuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/8848850899.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/anatomy_of_gastrointestinal_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5081520916.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/27159644568.pdf
    • https://cdn.shopify.com/s/files/1/0464/7183/9896/files/83171292445.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005833.bin
9b5643a52e5af3b5727c10a4415d5dce4e772dbd76e732e3aa8336265cb0d7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5833 5192 bytes
font_01_sfnt_off000069c2.bin
5b4904bec563fbda452a56e0485315f4ff1592bb15c9bd604fe9cc96ab549b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C2 10088 bytes

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