Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6ebcbbad56cd9f…

MALICIOUS

PDF

46.7 KB Created: 2020-08-08 15:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b66cb4586c1ece6c42207b768e0530d SHA-1: f89852392ce9971a217a72e04d72e96bdb09e04d SHA-256: bf6ebcbbad56cd9f472a82086d20d5e708c4fed55804cf5becd5e9c1087a6f5b
120 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting the primary intent is to drive traffic to this malicious site. No scripts were extracted from this sample.

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=beginners+english+lesson+plan+pdf
    • http://files.newtonmusic.org/uploads/1/3/0/8/130814001/07d64ed232428.pdf
    • http://files.marjorieorourke.com/uploads/1/3/0/7/130776123/1147fb4250aa.pdf
    • http://defomobid.memortazavi.com/uploads/1/3/1/3/131379732/cf9031.pdf
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/codex_gigas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/star_behavioral_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/87476825278.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/supper_video_converter.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/taduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/m54_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/baregalujizigivujurolow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4959/files/99571610599.pdf
    • https://cdn.shopify.com/s/files/1/0447/1144/4634/files/asme_b31_3_latest_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/73770614826.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/zigivosiguvitetofusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/loxijefanegitefijije.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/academic_case_study_examples.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_off000073d6.bin
3c4148066b06d94d3b6afe2115cd9601d3d93500d5d122710b33047569ab417e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 5352 bytes
font_01_sfnt_off00008607.bin
27077f0d51509a7b01318c718636e57ac8a828659f3522782833e60afb1c571e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 12292 bytes

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