Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5df6c67ec2df4ed…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 13:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ebb05c5541576104b85b62711f101e4 SHA-1: ecd69c0f56a105f552911bfaac87f7c01d9bad7a SHA-256: e5df6c67ec2df4ed9df19bb973bd16cbe72f30ee66a18c4c2f212a37fdc75d1f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a phishing or social engineering attempt to lure users to malicious content. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the attack vector. 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=advanced+excel+charts+pdf
    • http://puforok.thechildrenscouncil.org/uploads/1/3/0/7/130775451/mokakim.pdf
    • http://files.conflictfluent.com/uploads/1/3/1/4/131407406/4241434.pdf
    • http://files.rigodistrict.com/uploads/1/3/1/0/131069934/7fb952cebeb96.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/57580320162.pdf
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/total_gym_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/bebuzukevugetewanulukap.pdf
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/2789372722.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/bstc_2020_paper.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/wegisatilujired.pdf
    • https://cdn.shopify.com/s/files/1/0449/9036/5864/files/gisemufudinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/wulop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/4874394650.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/27594827862.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/whirlpool_washing_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/zakojorifir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/washington_dc_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetidolurat.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_off00007e95.bin
deb39ac4afd5732a884e8852cbe3e7b3212ed039b92b75400a60207a25d76878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 5360 bytes
font_01_sfnt_off000090cb.bin
1d5c9aa1d57e0fbebe79c3f1a767f292e48ed27817957ec5a4a2fc4f7edc2c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CB 10468 bytes

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