Malicious PDF — malware analysis report

Static analysis result for SHA-256 269543ba7f7d6d0d…

MALICIOUS

PDF

35.3 KB Created: 2020-08-11 19:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05b96abd3c09eb7c2e3fb938d4207e1e SHA-1: fad0af3262ae7291c6fb54cdb45624b8c8fff594 SHA-256: 269543ba7f7d6d0dc796affa107e3244d50d2aae588334b7b1fd88c47ba3d729
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, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'meat buyers guide' and includes the same malicious URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility of malicious content. The ML classifier also 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.cc/pify?keyword=meat+buyers+guide+8th+edition+pdf
    • http://files.thedevotedlife.org/uploads/1/3/1/4/131437335/7106428.pdf
    • http://files.stpetersindy.org/uploads/1/3/0/8/130874457/ec3fe04dd4cf23d.pdf
    • http://files.salferrantelli.com/uploads/1/3/0/7/130739564/zixeboluvi_lubijarugopeg_xevegumorisoves.pdf
    • http://davonesa.enlightenfredericton.com/uploads/1/3/1/4/131482995/loniloku.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/arabic_to_english_translator.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/15248735520.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/4120807484.pdf
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/denunosekojiradom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/physiology_of_pregnancy_and_lactation.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/fakifawegopud.pdf
    • https://cdn.shopify.com/s/files/1/0432/2938/0767/files/namorado_de_aluguel_le_livros.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/bluebird_bukowski.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/binomial_expansion_questions_and_answers_a_level.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/apics_cpim_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/20719565267.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_off00004934.bin
17ced37e1562b6affebc59117efecffdb470a0e5ba25ef271bf08299a9650167
pdf-font-stream PDF embedded font (sfnt) at offset 0x4934 5712 bytes
font_01_sfnt_off00005ca5.bin
40e9912621c6bd5d63ca3cd71323143c9918f59c7d8ac96350311b92ad709588
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA5 10144 bytes