Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09fc4080d99c54c…

MALICIOUS

PDF

51.6 KB Created: 2020-08-14 16:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d66d1fea968db6cc4603e1bc6c4c7293 SHA-1: 9d0c7efb8f43d644c9f5c12d400209e8083a7b25 SHA-256: c09fc4080d99c54cf28c27ca1148ac72b532cc1ab4dfb1b3274338f575cf9f64
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=tim+hortons+beyond+meat+nutritional+information'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains the same redirector URL, indicating the primary intent is to direct users to malicious content.

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=tim+hortons+beyond+meat+nutritional+information
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/93961749658.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/57486195471.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/jemujod.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/56128241686.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/gazatelaguratag.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/pinusatefasaluvogoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/35512924653.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/99737386635.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/vice_city_cheats_psp.pdf
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/nurutaxulekuturalibul.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/20400548116.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_off00007a34.bin
0a58f86e479543ea20f9cc85c1bf24514e0e386e94ed91ff7e507420893732fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A34 5220 bytes
font_01_sfnt_off00008bc2.bin
ea367e0e484be089efa47c7db354dd1097c74aeb755e1a65db4cc284a0dab37a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC2 11004 bytes
font_02_sfnt_off0000b16b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB16B 4324 bytes