Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56f5af9475b7e1c…

MALICIOUS

PDF

34.1 KB Created: 2020-08-30 12:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9418a4a7a2797c32a1a4dc81999c000a SHA-1: 4140fd1c4040933c7b880afd226384a9042a48d3 SHA-256: f56f5af9475b7e1c29101650ac06308b9c8a66d0de135a7de14ba42f33bb2aef
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=security+awareness+applying+practica'. The document body, though heavily obfuscated, appears to contain text related to 'security awareness' and the malicious URL, suggesting a social engineering lure. The presence of numerous links to PDF files hosted on static.usrfiles.com further indicates a link farm strategy to obscure the ultimate malicious destination.

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.cc/wix?keyword=security+awareness+applying+practica
    • https://static.usrfiles.com/ugd/08fe48_ac698d11382e46158cbcd1a62573ff7a.pdf
    • https://static.usrfiles.com/ugd/6df952_3b051420e72d4b369d4de10d40cd529a.pdf
    • https://static.usrfiles.com/ugd/455f95_15c3ef3d72b0461caee9bede4ec231f0.pdf
    • https://static.usrfiles.com/ugd/362633_d5e6ef5e48e44cfd8fb028548345584d.pdf
    • https://static.usrfiles.com/ugd/1b8612_26802e1ad9c14aa5b098e70e1a6227a5.pdf
    • https://static.usrfiles.com/ugd/314c35_0bdffc4e8f5b4cfebb6bdedd0bf4644e.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/bijaxavaseniwipasoruv.pdf
    • https://cdn.shopify.com/s/files/1/0439/6548/1118/files/adverse_childhood_experiences_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7525/files/bisecting_angle_technique.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/71664027683.pdf
    • https://cdn.shopify.com/s/files/1/0434/2251/5351/files/png_to_word_converter_i_love.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_off000045ad.bin
85ee1e76657c99b1e4f65369eeac05a8bbce701290b84c59cd72a82f0ed13f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45AD 5396 bytes
font_01_sfnt_off0000582d.bin
d63fa7369a046dfee4ebdf6526869f09d28641bdf341573d6010db22b3bf9291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582D 10968 bytes

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