Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec788d1575d21df…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 08:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d9fed9e689ac43bf52043235e2ce14a SHA-1: 87e542c4b85bf39f65e10535e14dcefdf6a495ff SHA-256: cec788d1575d21dfedbdf9dd2cf49d979853cc2c9f9d6590fb50282b2e0dd7d7
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF documents. One critical heuristic identified a link to known malicious redirector infrastructure. The document body contains a URL that aligns with this malicious redirector. The primary intent appears to be SEO manipulation or user redirection rather than direct exploitation within the PDF itself.

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=poetics+of+relation
    • https://static.usrfiles.com/ugd/a467d2_09cb1deb39f64667952eb955882fd9b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3edc7497a387403b9bba10a9cfa8e913.pdf
    • https://static.usrfiles.com/ugd/41a0b6_d8160cced8f3427e8ff50a065ecdf0e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bce332ee5b64ffbb48fa358c04ce955.pdf
    • https://static.usrfiles.com/ugd/51c472_e86470f1ddfd4051bf83bcdb3a97cae1.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_1a84fed1fa4143e3b980b42c17582831.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea318fec95d24d64a576e815c3a2f33f.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/65890792130.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/critical_point_calculator.pdf
    • https://static.usrfiles.com/ugd/b8c837_947bb5f389fb4debabc2e21b2e1a5749.pdf
    • https://static.usrfiles.com/ugd/d94ae5_25e18d0d629a420fa447dbd2ab4a4c84.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_off00007925.bin
d28e959ad2f196886c282033454c4e449a42410b7c06b8915068988f55128956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7925 4876 bytes
font_01_sfnt_off000089c2.bin
65348b0b95c0ced9cfe1da7465d70b1ea6d08953fab6386525c7f308420234c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C2 10216 bytes

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