Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3c46b38b0dd40a…

MALICIOUS

PDF

43.2 KB Created: 2020-09-04 17:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b80d521ce24aca30a961eb7390fb298 SHA-1: 2277bed68805de2a234ddffc6fca7b2aa128b02e SHA-256: 3b3c46b38b0dd40a4a1933a41ce19f410f7f89eece0899ea74166522ff476afc
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which are hosted on Shopify and appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.club, which is presented to the user as a "Urine dipstick results sheet". This suggests a phishing or scam attempt designed to lead the user to 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.club/wix?keyword=urine+dipstick+results+sheet
    • https://cdn.shopify.com/s/files/1/0440/6778/2808/files/somabufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/zezurorofigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5164/6119/files/2017_kawasaki_vulcan_900_classic.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/bd_jsc_result_2018_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/jekovegodenovotujuxe.pdf
    • https://static.usrfiles.com/ugd/3794ad_640a12537f084b57a9b43fc40ca636e9.pdf
    • https://static.usrfiles.com/ugd/136d07_43bcc7815fb24ce7a939ad298a9629b4.pdf
    • https://static.usrfiles.com/ugd/d99ef3_c92eab9201d347a780a5dfff6d541ab3.pdf
    • https://static.usrfiles.com/ugd/e745be_185b302eea0d4612abc8f61107a18ae6.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/word_for_following_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/13396413775.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_off000061cd.bin
4a7490c30601ef1207613fe76790294e72edf52b344ee45d4c63163b1c02ec76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5008 bytes
font_01_sfnt_off000072d9.bin
ada0a1b5c66ba4ce35fd39e0e3ba38af84fece436bec16dcb802280c68bdd938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 14508 bytes

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