Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41de4f3906c8874…

MALICIOUS

PDF

43.1 KB Created: 2020-09-04 14:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a203a619d2575f3c6da437299e4e944d SHA-1: 52240e4acab34e3d20b24d8484645c5239479861 SHA-256: c41de4f3906c8874af0d605027be32921cf5f0632bf1764e27ff64f9eb6d0d52
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/pify?keyword=que+es+un+tropismo+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to static.usrfiles.com. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF link, suggesting a lure to external content. The primary intent appears to be redirecting users to malicious infrastructure.

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.me/pify?keyword=que+es+un+tropismo+pdf
    • https://static.usrfiles.com/ugd/c33f71_b6ec2267fda44c99b75b8a2231fffc4e.pdf
    • https://static.usrfiles.com/ugd/906e9f_fb7ac78b5d39451aa10a25320e4655af.pdf
    • https://static.usrfiles.com/ugd/c57cae_532d4f607e6a471f966e372c7bfec87e.pdf
    • https://static.usrfiles.com/ugd/834936_bc2d7d179f75475085b2ce2623e6896a.pdf
    • https://cdn.shopify.com/s/files/1/0464/9238/5432/files/28052901618.pdf
    • https://cdn.shopify.com/s/files/1/0437/5586/4215/files/kunit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.pdf
    • https://cdn.shopify.com/s/files/1/0435/6734/9923/files/1927442226.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/farojisaderokoresurorami.pdf
    • https://static.usrfiles.com/ugd/a7074a_9dd581be43cd45c583e88127636c39e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4373865ff713443e9c4123674c41c7e9.pdf
    • https://static.usrfiles.com/ugd/c8d394_a4a9231998f34c88bcaf4aea9b79b7a3.pdf
    • https://static.usrfiles.com/ugd/822ecd_469e7760a4a8489896eeb9f1b8cc70ee.pdf
    • https://static.usrfiles.com/ugd/aff7ca_83f2c22bd6294b729dc558328df5fd9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0cc46f18ff542b3bfe17710fee3003e.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_aea305c3e3f545ceb94f2da7f8934626.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_off00006a76.bin
6f7f5f412365c7fd56442a5fe6ba8630d86a1808c6c44e5369488c523e072f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 5008 bytes
font_01_sfnt_off00007b68.bin
117877dfcc0e50d406f1454e607cabe419940a1ce652bf1f737b07c0c62cbd43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 10744 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.