Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbb9d2677a209c0…

MALICIOUS

PDF

46.4 KB Created: 2020-08-04 08:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a168169e10d253f316ebb9f136078c5 SHA-1: c48575359509acf9d17ec2102fb0c12d4abfca64 SHA-256: efbb9d2677a209c03dc8b0f2ec9bf3bd2eafa8a3237f18f1f36a5dcfab1ef009
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The primary malicious URL is used to redirect users to potentially harmful content.

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.com/pify?keyword=calendrier+septembre+2020+%25C3%25A0+imprimer+pdf
    • http://files.hazmatrobotics.us/uploads/1/3/0/7/130739309/5559e9905920e0c.pdf
    • http://files.rebeccahodel.com/uploads/1/3/1/4/131410685/genolijudiwekota.pdf
    • http://gopelulez.ohenrylibrary.com/uploads/1/3/1/4/131453555/revepeganelug-zorojuwewarezep-masimo-tebopujubiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/riwemobag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/sivoguke.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/vovugapijej.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/xexipasuketotebikivajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/fumubob.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3528/files/velipokexadumuwalot.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/78816433453.pdf
    • https://cdn.shopify.com/s/files/1/0441/0589/1992/files/mercury_outboard_owners_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/75252055575.pdf
    • https://cdn.shopify.com/s/files/1/0436/8872/2597/files/jejagemuvil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/20687175113.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_off00007079.bin
e0642a7cbfd9cf6153fbdf9d356dfedd584f5054a3b0546a839313728e6b71f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7079 5740 bytes
font_01_sfnt_off0000834f.bin
b09c86dfc4445aee6ffb7958c0b78d57f25e34687e3515a74417c23d541f18c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834F 12664 bytes

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