Malicious PDF — malware analysis report

Static analysis result for SHA-256 a529ebd1525403a2…

MALICIOUS

PDF

48.8 KB Created: 2020-09-06 21:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7c31dfcee4f09a8902101815c15a33 SHA-1: c3a7a5044a276d8a4c99af10c7e62ca27bd8289d SHA-256: a529ebd1525403a2d1d7dc9ff57b6c4fa95de3a1b72ffe58ef4350920e8f53d9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=android+automotive+build'. This URL is embedded within the document body, suggesting an attempt to direct users to a malicious site. The presence of a PDF link farm heuristic further indicates a campaign to distribute malicious content. The document body itself is heavily obfuscated but contains the malicious URL.

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.club/wix?keyword=android+automotive+build
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0462/3423/9125/files/47879432055.pdf
    • https://cdn.shopify.com/s/files/1/0432/2993/7832/files/zebamipezina.pdf
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/figalaxuxukowafibakija.pdf
    • https://static.usrfiles.com/ugd/1ee69b_1cbf0d12acdd4214a106af65c12a3213.pdf
    • https://static.usrfiles.com/ugd/529385_7cfed9c7c1894f32b8ed774c89128ce5.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_0e53d709eeae4ff4a2a6754d69aebbee.pdf
    • https://static.usrfiles.com/ugd/b8c837_00b3d5b5938c44d1b04ac96dc5199399.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/95132069500.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/advanced_excel_pivot_table_tutorial_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/wakufodupolisogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/35844358264.pdf
    • https://cdn.shopify.com/s/files/1/0434/6658/8325/files/4020608468.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/canada_federal_election_candidates_platforms.pdf
    • https://cdn.shopify.com/s/files/1/0434/8284/1250/files/93684959698.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_off00008002.bin
ad76ba4977d1548f8293df1b62dd869759fa1e60e89960b035bdddac0cc7decd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 4980 bytes
font_01_sfnt_off000090de.bin
f578aeded9b1f52c2f0fff1568b06d1aea081c5ca64b1f3d9e587fcfe667dfa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DE 11560 bytes

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