Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22755f1c2f9edb9…

MALICIOUS

PDF

70.7 KB Created: 2020-08-17 03:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d194e5a836066db7605866e8fc0eac SHA-1: 322e5306c22b427e80e0286a79e3a47f04c7966a SHA-256: e22755f1c2f9edb9f5e2830babd547bcccfc7a1caa388cb83c03e31716ae89d6
150 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious URL, specifically 'https://ttraff.ru/pify?keyword=donation+value+guide+for+medical+equipment'. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Donation value guide for medical equipment', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm strategy to distribute the malicious content.

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=donation+value+guide+for+medical+equipment
    • http://files.spauldingplace.com/uploads/1/3/1/0/131070452/zekamunuvexaz.pdf
    • http://files.ovband.org/uploads/1/3/2/6/132680860/6614476.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/92231782350.pdf
    • https://cdn.shopify.com/s/files/1/0432/4094/7880/files/argumento_cosmologico_de_kalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/labati.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/antigeno_p24_vih.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/nujigojunanavidaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/physics_fourth_edition_walker.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/tevuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/48422222806.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5975/files/c_sort_array.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/star_plus_serial_behnein_song.pdf
    • https://cdn.shopify.com/s/files/1/0445/5497/7444/files/earned_it_chief_keef.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_off0000d67e.bin
178cccc1c46d610b2cd3b7ab8c066a345217e0c088e3eea6096a8978445d5c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 5480 bytes
font_01_sfnt_off0000e90f.bin
b327f16a86a05b3dee3425b2304b94167cd442835cda2d1707b54076f4a748db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 10756 bytes

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