Malicious PDF — malware analysis report

Static analysis result for SHA-256 833fcd79bd3aacd6…

MALICIOUS

PDF

51.9 KB Created: 2020-09-12 03:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80305bf4f61196c7f8518a5d39ea1232 SHA-1: a21a015cdb33833ace497398147c319d00382c46 SHA-256: 833fcd79bd3aacd6a726dbacde1ff2aa86b4589aef289e5c8c19d59be1f65cec
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/wix?keyword=cam+8+test+3+listening+answer'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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.me/wix?keyword=cam+8+test+3+listening+answer
    • https://static.usrfiles
    • https://static.usrfiles.com/ugd/405339_dc25875dd6024ee6b16139face0ea402.pdf
    • https://static.usrfiles.com/ugd/c88839_545721912dfc4ea2a36bc2216e1c8e9a.pdf
    • https://static.usrfiles.com/ugd/99965f_c6560857b3f64b418a62de7e5f494a7c.pdf
    • https://static.usrfiles.com/ugd/485053_676fa624ecca407e854a4d4e83f4328f.pdf
    • https://static.usrfiles.com/ugd/455f95_d8ae68fd193849d898bde868bcd5be99.pdf
    • https://static.usrfiles.com/ugd/e3ff21_7419a40eead74a67b943abc6ae842556.pdf
    • https://static.usrfiles.com/ugd/8ebb60_4a4c87ca3c864adab1de9a39b6e4e43c.pdf
    • https://static.usrfiles.com/ugd/3d7af5_c66f6b02278b41a795361c80f53bc50a.pdf
    • https://cdn.shopify.com/s/files/1/0448/7839/7607/files/60887835189.pdf
    • https://cdn.shopify.com/s/files/1/0439/4749/1486/files/vipatixesitinon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/la_pasion_segun_antigona_perez.pdf
    • https://cdn.shopify.com/s/files/1/0428/1725/7628/files/common_accidents_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/printable_color_periodic_table.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/iphone_facebook_messenger_for_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/john_paul_jackson_dream_interpretation_dictionary.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_off00008a90.bin
f259e7d74447c6efc256703d4e85bdcba78d5ef3c8137a6ae178ee35a15f2370
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A90 5360 bytes
font_01_sfnt_off00009cbb.bin
048ea61002e2e1945fa194c6bd871f10b0c59b200606404935db48f783f3f86e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBB 10600 bytes