Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf59dafb89a182cd…

MALICIOUS

PDF

54.9 KB Created: 2020-09-01 01:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7332667854b76c063d43973895927fe9 SHA-1: 43fd9c53d9838c95e9f4e83da69e9122c487e011 SHA-256: cf59dafb89a182cd9d1488b9b6b09146c7439222700d15fd7fbec24e4ce1b9de
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=gdv+surgery+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'gdv surgery report', suggesting a lure to trick users into clicking the malicious link. 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.com/wix?keyword=gdv+surgery+report
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/jukejigarulufanirod.pdf
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/summer_camp_counselor_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/87638111689.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/79139512922.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/topology_optimization_altair.pdf
    • https://static.usrfiles.com/ugd/68ec51_34d80b4cbe41445b9c4791638290b162.pdf
    • https://static.usrfiles.com/ugd/6f58fb_25c10de04a2141b6a1e2a8399ed70d28.pdf
    • https://static.usrfiles.com/ugd/d54300_e5d7d0e856864b29a1e11100b13a033a.pdf
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/posthuman_board_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8917/files/15446180341.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/65653351159.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/18935763587.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/40976646677.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_off000096fa.bin
cd4016208ef69c025e8706817fb9526ed839cc725d4134aea1f686e25854b566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FA 5076 bytes
font_01_sfnt_off0000a865.bin
5e73521b0c88ab574fea969268af4638b9d30e6a6ede2c1a86fae8397728bb5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA865 12008 bytes

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