Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9c95ed8e534903…

MALICIOUS

PDF

46.1 KB Created: 2020-08-17 07:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7e5538346da1240688dc64aa2127d8 SHA-1: 671ba726bae2a75d22c8c484a958270e15bcf774 SHA-256: aa9c95ed8e534903d17adfb7d038fe5d5fddb784ad5b85de917c775abc713766
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=bijli+ki+taar+lyrics'. Another heuristic flagged the document as a link farm, with 11 external PDF links, suggesting a coordinated effort to drive traffic to various sites. The document body, though heavily obfuscated, contains the same malicious redirector URL and several benign-looking Shopify URLs, likely used to mask the malicious intent.

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=bijli+ki+taar+lyrics
    • http://fexuv.organicchefcoty.com/uploads/1/3/0/7/130776445/3443720.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/89627579145.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/80765598078.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/xezik.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/kuwifolozowiworoji.pdf
    • https://cdn.shopify.com/s/files/1/0451/9782/0053/files/habitos_alimenticios_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/american_football_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/local_anesthesia_malamed.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/xozafaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/1900/2279/files/javascript_event_listener.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/choas_faction_2_hacked.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057f1.bin
6add45294db2d99f45d8b6c1fcf6d19715899862c48124d5c229b818b13d0b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F1 5084 bytes
font_01_sfnt_off0000694b.bin
c520caa3d0b2fcbb11e8b87e8f66ea59276989d84f9bef236c7de6abe7a1aa44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694B 13356 bytes
font_02_sfnt_off000093e9.bin
3766c8a359ab3c67cad7bdc6b46b3dc8bb801a5d90187ac677404747215312a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E9 6200 bytes

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