Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f29123fdb72d172…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 20:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64efff7d469008ca0534d8aa2d9f5308 SHA-1: 5948769b44fdaf1c460a2516cd1f001f16eae162 SHA-256: 1f29123fdb72d1720e34ce3bfb3a5efb594e62e9cdb2d7502e57b74c642452e2
120 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 'https://ttraff.ru/pify?keyword=english+language+proficiency+research+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing this finding. The presence of numerous other PDF links, identified as a link farm, further supports the malicious intent.

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=english+language+proficiency+research+pdf
    • http://files.vahidjahandari.com/uploads/1/3/1/6/131637606/fakomobozipera_xidexukabebu.pdf
    • http://files.5fingersand10toes.com/uploads/1/3/1/4/131406684/buzazatulozagedig.pdf
    • http://files.cruzah.com/uploads/1/3/1/3/131398059/gumuden-pamivepu-pewikiwid-zenem.pdf
    • https://cdn.shopify.com/s/files/1/0437/1087/3750/files/storytelling_como_fazer.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/all_my_loving_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/11801813848.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/basic_accounts_payable_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/kewobutekikixugejazagote.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/architectural_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0430/2058/3065/files/14140077249.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/lonaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/53830086188.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/86729954671.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/47685037677.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/ashby_material_selection.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/kupivisakelawazobo.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_off0000706e.bin
7c168fbdb633d549b147938a5e77fa9584b3719b75db03ed7ddc33b098ef62ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 5476 bytes
font_01_sfnt_off00008317.bin
fcb5eea58999a573776ce486b42887d53dc30193b4f323530e2bce7c8ed1a4b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 10348 bytes