Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4c28e115edc2e5…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 04:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6826b89c52a64dab8c5859c908d457c2 SHA-1: 2764175e03ae5e8a13540481f434fc492e48291c SHA-256: 9f4c28e115edc2e56b12bf9b40a5c62650c27a590151cbbf4abc9a799a283c73
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a query parameter related to 'Summertime Saga'. This indicates an attempt to lure the user to a malicious site. The document body also contains the same URL, reinforcing this finding. The file is a PDF, and while no scripts were extracted, the presence of a malicious redirector is sufficient to classify the attack pattern.

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=summertime+saga+all+scenes
    • https://static.usrfiles.com/ugd/d5d855_f681b4834a46495682ab02b7c6bdfdab.pdf
    • https://static.usrfiles.com/ugd/e42ee3_f380af83216748d1995bf61d0a411a76.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0e1926c5eaf4f6ca333fe385fc3c892.pdf
    • https://static.usrfiles.com/ugd/a64c8c_c893cc25b15f475d8add8637192e4782.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/dialectical_behavior_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/64006916751.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/pison.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/vosodidepabukoxabovev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/16653352943.pdf
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/3989619390.pdf
    • https://static.usrfiles.com/ugd/b8c837_72cc9411a6e04e4992ef968791678a7a.pdf
    • https://static.usrfiles.com/ugd/e1d12c_cb2052c0831e41a985f2089bedae960b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6b09d0ef47d445bb7a58f12c76a5975.pdf
    • https://static.usrfiles.com/ugd/6908d7_5ca620bff39d4e13a6b9df19ef5c0bdd.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_off0000726f.bin
70c124eed6f18c01ddd0eeb492e65cc52370d69321a3fc67ad739359c9c456d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 5220 bytes
font_01_sfnt_off0000840d.bin
1e149eb91c3c2f9949d6f90d4a84dbee25407e1df441e2dca5877dfaa15275a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 10016 bytes

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