Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b59ab7d734bc9a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 22:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a326852cb732d9ab8623cea9f7c314bb SHA-1: f0ee0ca54332ad4ea9ec186417537408ae9e6cd8 SHA-256: c3b59ab7d734bc9a62975d5cd46c6e2d1fd3a88b72619e62b0d17c5b5f443420
150 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 ttraff.com. The document body, though partially corrupted, includes the same URL and a title suggesting a lure. The presence of a large number of embedded links, many pointing to static.usrfiles.com, indicates a link farm strategy. No scripts were extracted, but the primary attack vector appears to be directing the user to malicious infrastructure via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=what+happens+if+your+dog+licks+your
    • https://static.usrfiles.com/ugd/57c819_e456104669074529841255abdab59f3a.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_7cce67b5133a41f681cd6e8f07d7b133.pdf
    • https://static.usrfiles.com/ugd/b8c837_020fe300be4e4cbbadafe8ae2b3033d0.pdf
    • https://static.usrfiles.com/ugd/8acad3_004b991bd66b45f29f09d333d946ddf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_61dc039615f94bcd81525e48d6b394d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c28722ba0fb4ef7952034c59dc9e030.pdf
    • https://static.usrfiles.com/ugd/23e9be_8ce06060472140cb83aaf753d24104fe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/fibukozetodurotofokoloxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/78121447317.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0409/files/anno_2070_building_layout.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/kolajiwuwasebumu.pdf
    • https://static.usrfiles.com/ugd/2f8cea_dc36c8989596495faa6b4803338973fb.pdf
    • https://static.usrfiles.com/ugd/ce14f3_c088f7b785bd4c1a92df11c2ed4f997e.pdf
    • https://static.usrfiles.com/ugd/87fdc7_4a2779bd9657450aa92464aa229bc69e.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd7a737b79a64f16bd84e5ce8b452e61.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_off000069da.bin
01948e3db61cbad3e5ecdd67f123b0e733167c1f92071386df312684c378a54a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 5596 bytes
font_01_sfnt_off00007cef.bin
cbaccc6378066b5aaa4f74c4b415763c6f9a05feb2b08f7d7b068994514ca437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEF 10072 bytes

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