Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c1027ecf00a381…

MALICIOUS

PDF

66.3 KB Created: 2020-08-19 11:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b30a6d01ec64210215a2cfc3ead64d11 SHA-1: 8939def1014d4107bedbcd1f16276c26c0f52e0e SHA-256: e0c1027ecf00a38151cef9b7125a6122fa50c8d4607786c79172a2d44338e8a0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a '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=dialectical+behavior+therapy+pdf+workbook
    • http://vababeva.davenportsandgravel.com/uploads/1/3/1/4/131453267/diradoxiseli-navapej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/saints_row_4_cheats_codes_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0448/5870/4034/files/ct_scan_machine_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/76237667540.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/54608571369.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/rixanotarewej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/dofowofoni.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/illustrative_mathematics_grade_7_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/modososuji.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_off0000c43e.bin
5bb3c16fbe717bd292bb658b8327a4b09f3b5d890653931e6a0e1f77bf3e62b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 5520 bytes
font_01_sfnt_off0000d712.bin
7271938e31ee4e0791d72f57a09ba05f948c68e3b8b3c660c46077569c4fa718		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 11148 bytes

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