Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27eb0ef2104e3d9…

MALICIOUS

PDF

40.2 KB Created: 2020-09-07 01:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 845281a2e3ac38774082bc3505b28ba3 SHA-1: 7dacf84a28a0fd9dc637c25be82988a08fe46001 SHA-256: f27eb0ef2104e3d95411ba1ff6f90c962315d79cc83968fdaa0512dd0711cffd
120 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous URLs, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.link/wix?keyword=size+bed+sheets+dimensions'. The document body, though heavily obfuscated, also contains this URL and references to 'size bed sheets dimensions', suggesting a lure. The presence of many Shopify links, while some are confirmed benign, indicates a pattern of using legitimate platforms to host or distribute malicious 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.link/wix?keyword=size+bed+sheets+dimensions
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/65756522082.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/campbell_essential_biology_6th_editi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/riven_guide_aram.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/41897129715.pdf
    • https://cdn.shopify.com/s/files/1/0460/1590/5951/files/rixizofef.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/lamewakot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8001/files/anbe_sivam_songs_ringtone.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17292eb6db1468bb6f5aa040c921649.pdf
    • https://static.usrfiles.com/ugd/3ce946_208112bcec9648a0ae50ca79093ec74d.pdf
    • https://static.usrfiles.com/ugd/041b56_7b83218863ec40fea6625fb578f21da3.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/26724360939.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/xezifewiriwelav.pdf
    • https://cdn.shopify.com/s/files/1/0445/3623/4148/files/briggs_and_stratton_engine_rebuild_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/78529952643.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/bookmark_mac.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_off00006112.bin
a9896463da3273efe21e2d7abd3a2411055409b26de7dc524b7bcceb954e418d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 5020 bytes
font_01_sfnt_off00007208.bin
575db7ef3025cee7b1fbcf791199a90d84ddc08ea4906dbff49d04efa472cecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 10000 bytes

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