Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27ba9500dbc8cbb…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 03:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9926bf57491a25b9d5762e40fa4c278f SHA-1: 16034946316e79f88d560ca3214e94dd99fca5f7 SHA-256: c27ba9500dbc8cbbc9e2d04e4934183125e37d2e19f60ad8805eecff273fb03f
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 'https://ttraff.ru/pify?keyword=beatles+white+album+sheet+music+piano'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering 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=beatles+white+album+sheet+music+piano
    • http://files.dqeast.net/uploads/1/3/1/3/131380297/8435313.pdf
    • http://wepusegi.sp-arms.com/uploads/1/3/1/4/131453718/jefojowatinizi_vojifizas_zizawofelilebad.pdf
    • http://files.riverside64reunion.com/uploads/1/3/1/8/131871622/5718180.pdf
    • http://files.drevechoe.com/uploads/1/3/1/8/131856105/xowiletem.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/minion_songs_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/21559816457.pdf
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/probation_officer_exam_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/kejovijazug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/corner_bookmark_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/64418949540.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/futasitokikeserag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/gidilogofop.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/36135081434.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/how_to_renew_adobe_trial.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/dufawexawiposefubidasu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006447.bin
dcebcfc9a0484eef259a3418cb8db7716b7836de91cb6d00701c1cecce73192f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 5240 bytes
font_01_sfnt_off000075f1.bin
6d49e28eff605e54cff33938357ec0b581689f77f2256dce0dc649c79c3f4249
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F1 9988 bytes
font_02_sfnt_off00009824.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9824 4324 bytes