Malicious PDF — malware analysis report

Static analysis result for SHA-256 96baf4b02a9bbaaa…

MALICIOUS

PDF

44.9 KB Created: 2020-08-04 22:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b348c4fc57b7f0d0077ea978e0b302 SHA-1: b21f0847deea2c71f1d73579c206972909579a94 SHA-256: 96baf4b02a9bbaaacffa14e352fd4afe85a62d65e708a4a98da3a611351a7b7c
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 'https://ttraff.ru/pify?keyword=alopecia+androgenica+en+mujeres+pdf'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for obfuscation or to appear legitimate. The ML classifier strongly flagged this PDF as malicious.

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=alopecia+androgenica+en+mujeres+pdf
    • http://files.asctransit.com/uploads/1/3/0/7/130739614/vesipu.pdf
    • http://files.piersonpsychology.com/uploads/1/3/0/9/130969340/lavofifekijonal-vajesorowuva.pdf
    • http://files.recollectiveway.org/uploads/1/3/1/8/131871699/9393181.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3243/files/71794864264.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/aocs_official_method_cd_8b_90.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/rovowojepiferamenamifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5766/files/55170362202.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/47096806947.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/diwebosanede.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/narakekakad.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/kesifokararodulexaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/11724061931.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/beginners_guide_to_python.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_off000061b9.bin
c7e3b338a1e962a2de341daea502ec4d18be2e78408199042808b216a81ce851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B9 5340 bytes
font_01_sfnt_off000073c2.bin
6942309e68c16595006a29e284781e46a158a33478b6242710e705b3b75edae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 10892 bytes
font_02_sfnt_off00009747.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9747 4324 bytes

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