Malicious PDF — malware analysis report

Static analysis result for SHA-256 e779c94c19ab0277…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 14:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 034c4ceb5d63ee97190da6dfad0fcd32 SHA-1: 584c85361eae29ee463e1ebe1d88c9982b4c3384 SHA-256: e779c94c19ab027790af1efcc74647a8c2036323d13cb11458e946b04d5646a1
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and text related to 'beat hip hop music', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination. No scripts were extracted from this sample.

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=beat+hip+hop+music
    • http://files.thedigitaltheologian.com/uploads/1/3/1/4/131411539/sepam.pdf
    • http://files.cornerstonechurchofalpena.org/uploads/1/3/1/4/131453684/dadiregi_junadete_fomujoxaxafu_jisatele.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/1003732494.pdf
    • https://cdn.shopify.com/s/files/1/0447/8559/8615/files/video_questions_the_evolutionary_arms_race_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/33710030720.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/p90x3_nutrition_plan.pdf
    • https://cdn.shopify.com/s/files/1/0436/8252/9445/files/break_even_point_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/felidafebegizegowobawuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/add_whole_numbers_and_decimals_worksheets.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_off0000644f.bin
544fb7807064c89b6d6e83a5c9b8477c546a84a0e451ff8ebe7c6873045e1222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644F 5096 bytes
font_01_sfnt_off00007580.bin
d2afeed527cc2dbf0b4ad1b47800e6a456d6b152528b756d7c1ec156842b7acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 10636 bytes

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