Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f165213b453dbe0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-17 17:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be96be9a7b2012c574a5517e38337423 SHA-1: 3f222523a7b0e51f5349d231b92d6dd46e5b926d SHA-256: 9f165213b453dbe0092b7d933cd8d806af00a755a8ef8e134596b8d32c23e126
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.ru. While the document body contains some text and URLs, it is heavily obfuscated and does not provide clear instructions. The presence of numerous Shopify-hosted PDF links, some confirmed benign, alongside the malicious redirector, indicates a potential attempt to disguise malicious activity within a larger set of links.

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=chakram+film+songs
    • http://kosut.glbahorse.org/uploads/1/3/0/7/130776433/kadewaledu-komebipixaj-vusutarafara.pdf
    • http://letoga.ezridelv.com/uploads/1/3/2/6/132683041/menubedapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/jetaresanibuwon.pdf
    • https://cdn.shopify.com/s/files/1/0436/1197/9939/files/7th_grade_math_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9835/files/xajasiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/11320271299.pdf
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/79461585519.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/95684883601.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/cowboy_emoji_copy_and_paste.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/futuvixoraridako.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/27797425757.pdf
    • https://cdn.shopify.com/s/files/1/0449/3679/0171/files/cardiomiopata_periparto.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9910/files/makalah_marasmus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6884/0341/files/checklist_for_wedding_planning.pdf
    • https://cdn.shopify.com/s/files/1/0432/6234/5384/files/3370241547.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6026/files/letter_of_recommendation_template_for_employer.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_off0000626f.bin
c7a6a84bf9e88ec8273a72effdfeac91530cfa37664d9b50e72412ddcdd3b266
pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 5152 bytes
font_01_sfnt_off000073d3.bin
35c2691c9a989a99121eadbf0abdb9bc812c53553f4f9e662417bde5266b0b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D3 9816 bytes