Malicious PDF — malware analysis report

Static analysis result for SHA-256 43141bb4497a74db…

MALICIOUS

PDF

47.2 KB Created: 2020-07-24 09:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0fc6dada04c744949ac70a0deeb7344 SHA-1: 8a38e0f35a521d7371098ad8b38fa7d4a1c5cd02 SHA-256: 43141bb4497a74dbef360521c059bd5c301e97d56535d2efcf19263a070d2ac0
154 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, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm, with numerous links hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting users to potentially harmful content through these links.

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=usda+colorado+hay+report
    • http://files.lyonsvolunteers.org/uploads/1/3/0/9/130969634/sorizuvako_zinul_movevesuj_sixituxivid.pdf
    • http://files.myrainforestpets.com/uploads/1/3/2/7/132740700/e087a8.pdf
    • http://files.journeyboundmusic.com/uploads/1/3/1/8/131856539/nirijuwoz_nofepu_nolex.pdf
    • http://files.journeyboundmusic
    • https://cdn.shopify.com/s/files/1/0437/8758/3650/files/43664443159.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/62905073400.pdf
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/tofudobifexogejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/66428645005.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/bosaneredululitupefuvezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/dotugomepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/85678712141.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/nanukosidisaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/10430065117.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/fukisifufemedematexam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/mutusaxidolam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/31821577112.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd7.bin
193ace1837a9f1f091df657a897e072edf4100eb70b62e4b17bff850ff7342e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 4888 bytes
font_01_sfnt_off0000808e.bin
d772cbed3c4c2e785b982062fd2805d4d19442e5852b09cc6a9cf70d42179266
pdf-font-stream PDF embedded font (sfnt) at offset 0x808E 15144 bytes