Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c95e511212ce94e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 13:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783503fbccf243ae34f413025f256b75 SHA-1: b3c45dd9581676d24d759e5f19ec910243149e1d SHA-256: 2c95e511212ce94ea14c07f425611cebe37957316a2cf4917a0105eb40b90df5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that masquerades as a download for IELTS listening test materials. This link redirects to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious URL. The presence of a visual download button heuristic further supports the lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ielts+listening+sample+test+pdf
    • http://files.strongerdaybyday.com/uploads/1/3/1/6/131606335/tudawow.pdf
    • http://jukumovig.backcountryexplorers.com/uploads/1/3/2/3/132303382/nupakukeveg.pdf
    • http://files.smwvumc.com/uploads/1/3/1/4/131437513/9991759.pdf
    • http://vikabezo.ashleyssweetchips.com/uploads/1/3/2/6/132695663/rolumukukowevosute.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8746/files/64246377103.pdf
    • https://cdn.shopify.com/s/files/1/0436/8665/8213/files/bexokijarusedajugamozoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/jatunoxokufiloxijukupide.pdf
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/knee_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/bsc_1st_year_zoology_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/wofixujepiralirupupilipud.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/tabasurukuzoze.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/burgreens_menu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/30796611073.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/big_ideas_math_algebra_1_california_edition.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_off0000621a.bin
fbbc4488ef6982f6804b876b182cf7b6083601e665f8930b91f30bf26e67347b
pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 5204 bytes
font_01_sfnt_off000073bb.bin
ea69f37b4277a152d7291741663cb808be5c81f9c063baf56bf8e8a2ce2d4aba
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 10404 bytes