Malicious PDF — malware analysis report

Static analysis result for SHA-256 348294e19d2a0027…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 04:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a284f6600b979f6e0241c43a38c88777 SHA-1: 428985d984fede2cba2c391fb2d4054813ad1637 SHA-256: 348294e19d2a0027cd3959513fe1f8bf299dae009a2baa00b7543e880d416b5d
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a "Marlin 39a owners manual". The primary malicious URL, https://ttraff.me/wix?keyword=marlin+39a+owners+manual, is designed to redirect the user to further malicious content. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, likely to improve search engine ranking for malicious lures.

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.me/wix?keyword=marlin+39a+owners+manual
    • https://static.usrfiles.com/ugd/b8c837_72f3e7aed4a646a0a6eb583b5daed43c.pdf
    • https://static.usrfiles.com/ugd/08fe48_e95eaea44294407a86ef617193d5cb57.pdf
    • https://static.usrfiles.com/ugd/61804c_1244b71aa65342f48c7aec0f84ad8bca.pdf
    • https://static.usrfiles.com/ugd/0c4177_650ac2fb1f2546028d937c1431d60b0b.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/kunuloxekarosiwug.pdf
    • https://cdn.shopify.com/s/files/1/0437/8381/5325/files/disputing_errors_on_credit_reports_letter.pdf
    • https://static.usrfiles.com/ugd/9c43ec_3c4af0fd6d9d4e29a5ba84081884dcf7.pdf
    • https://static.usrfiles.com/ugd/33a16d_1e2189d6998a492e817932ebd5411a6e.pdf
    • https://static.usrfiles.com/ugd/73c254_d0ee4a4db0d44f8195b3d8465d624022.pdf
    • https://static.usrfiles.com/ugd/fbccce_2c726fcf173047b9be22605d5c1ed15d.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/tagoregopilojonubus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/sudisuku.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/tinizew.pdf
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/watovufabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/93487952248.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_off0000480b.bin
f0e21559fa6bbfe4a1dde6deb02a1f03fb593b7df26ead32bb74173ee77f2616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x480B 5248 bytes
font_01_sfnt_off000059d9.bin
15d23d030b641c172b4fc812d53ff89b6b5c33120a80fd430f3b21d67986efda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D9 9800 bytes

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