Malicious PDF — malware analysis report

Static analysis result for SHA-256 383059b51f153acf…

MALICIOUS

PDF

85.6 KB Created: 2020-08-30 08:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91de03d0f2fb059a5aa32e787115f8d2 SHA-1: 14bc91dbec19339ed8a2c08211867c710f9a3120 SHA-256: 383059b51f153acfc52511ce4c6cef8eeb52511aaca5e0226c77c33b3257a342
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=wow+disc+priest+pve+guide'. This URL is presented within the document body, disguised as a game guide, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to 'static.usrfiles.com'. While some of these are benign, the primary redirector is malicious.

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.ru/wix?keyword=wow+disc+priest+pve+guide
    • https://static.usrfiles.com/ugd/41a0b6_d3f1ec3da33f40e8a5a31f6395cd9ed3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f46307689d54debacfec8c14670a98d.pdf
    • https://static.usrfiles.com/ugd/3b47cb_c908d24d868d48599c91bc527c7448a8.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/anatomy_of_fetal_skull.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/16472892330.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/still_commodores_piano_sheet_music.pdf
    • https://static.usrfiles.com/ugd/99965f_e1d42b4b1ed04024b7d8afafc1189072.pdf
    • https://static.usrfiles.com/ugd/510a18_e6ca40df99fe4e2a8c2eb0f8c49255bf.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_a5939f6b7e964c51adcebc4329b1c2ab.pdf
    • https://static.usrfiles.com/ugd/f523c3_732ad13d3a6347ef8fb0f5545837c48c.pdf
    • https://static.usrfiles.com/ugd/8ab72e_8d2d1b98976b41029500c614b82204f6.pdf
    • https://static.usrfiles.com/ugd/95089d_08f26dd71e754199a4ffa99e4dd51324.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_off0000fd6f.bin
dd3c7036b9dda3f48a0c8a8ff9bc4d1437419877d0109872c5467a41ca55e5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 5164 bytes
font_01_sfnt_off00010f38.bin
19dda77acbf7ccf6ffb17ac02f313823c0eab0847edfcf4608f17567b6db8a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F38 10864 bytes
font_02_sfnt_off0001347f.bin
7e28333d71a2e4573b221cfd9371d800bf7c4d3f8dd8c76d056b2d1db0f3cb40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347F 16096 bytes

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