Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c39b5a0bf65d545…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 21:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 510e0f7b69a04fc5043d823cf3425c08 SHA-1: b338ffe50ec8358a3f75cac8d1ceb439c7747e99 SHA-256: 4c39b5a0bf65d545958af97f2fd7373df44e15ff8e1a5a128259d5cc565367a0
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=realtek+8101+vista+driver'. The document body, though heavily obfuscated, also contains this URL, suggesting it's intended to trick the user into downloading a driver. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic to 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.com/wix?keyword=realtek+8101+vista+driver
    • https://cdn.shopify.com/s/files/1/0461/3675/4329/files/war_hypnotic_brass_ensemble_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/pomut.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/rutolad.pdf
    • https://cdn.shopify.com/s/files/1/0447/9369/2326/files/all_full_forms_of_computer_subject.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/51505120987.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/48921571847.pdf
    • https://static.usrfiles.com/ugd/b8c837_b88d344323bb46cabc741122bd7c87af.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a8ca4a5a50c47028ce5fe13b746f482.pdf
    • https://static.usrfiles.com/ugd/b8c837_570def4cd44b4f70a49af5a8ff07f404.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/feredivebalakivesop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6431/files/wallpaper_love_you_mom.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/fibivutuvunivokujuredexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/defining_functions_in_python.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_off00005bb2.bin
370b63e99b3bc2c1d8b7a2bfc1693e0257dccade0e64e814f912f9e1c3af29e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 6548 bytes
font_01_sfnt_off00006c08.bin
57eecd75621fbd825512f95d24619c6b90804770a7579d67d960d44d75206aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C08 5340 bytes
font_02_sfnt_off00007e3c.bin
1b8974afe20509256719aaa22778477a1e595494d7b29ee161b7a14b6da0d6e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 13828 bytes

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