Malicious PDF — malware analysis report

Static analysis result for SHA-256 506f4c771706de0c…

MALICIOUS

PDF

49.1 KB Created: 2020-08-15 18:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc66ce6a9a93ea596b04368549fdc6f5 SHA-1: fdcf9860f554febc996b663e9abad7ff8b86f5e7 SHA-256: 506f4c771706de0ccc6379a6fb4768c9c27d2d0cc9add1a0a1a0a148e89899f7
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 'https://ttraff.ru/pify?keyword=dell+t340+specs+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve the discoverability of the malicious PDF. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

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=dell+t340+specs+pdf
    • http://files.halloweeninthehills.com/uploads/1/3/1/1/131163851/tazagaralut.pdf
    • http://nopon.rockwoodarts.com/uploads/1/3/1/8/131856570/12e068.pdf
    • http://files.naturalpediatricmedicinellc.com/uploads/1/3/0/9/130969356/fozivizujitafininize.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/daubert_tracker_case_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/tejotufezimobuvepuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/lenilazojemunalubevodus.pdf
    • https://cdn.shopify.com/s/files/1/0437/3741/5831/files/feferufufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/demokrasi_menurut_para_ahli.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/alter_ego_a2_plus_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/48528349663.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/pdf_marxisme_untuk_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/toputal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/miss_celie_s_blues_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/xiremijewano.pdf
    • https://cdn.shopify.com/s/files/1/0430/6911/2474/files/types_of_bridge_bearings.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005796.bin
796b179fd43f0a5a47d799f6c5198bb9dd1c7d69aa967b1b254e521098b425d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5796 4760 bytes
font_01_sfnt_off000067d9.bin
6e86057293c691db27eabe57fa85ff5a6901772bba3f83999544235d82abca34
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D9 6360 bytes
font_02_sfnt_off00007883.bin
095e0e46ca1d612f84bd199a7feca7dfa11036baa80326dbdb18fa710ee4790a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 15164 bytes
font_03_sfnt_off0000a73d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA73D 4324 bytes