Malicious PDF — malware analysis report

Static analysis result for SHA-256 38907b0d05e879fb…

MALICIOUS

PDF

49.2 KB Created: 2020-08-30 04:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0591b7fdb475fceeb6c39cbf0a61cf SHA-1: c7f27c761bd052260946d1b73a9878e5d3978d72 SHA-256: 38907b0d05e879fbb78d82c65cffdcb19b74e8c1c3ab15ffe0e70cd8bf54b9d3
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to software and a URL that aligns with the malicious redirector. This suggests a phishing or malware distribution attempt, leveraging a link farm to obscure the ultimate destination.

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=autodesk+products+2012+x-+force+free
    • https://static.usrfiles.com/ugd/eaf48f_e565234ff34540c7bf71c650cd5b7af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a227b7e916a457b9ae8e2dbba4cf81c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3893e123da54d9893a167f3cf863578.pdf
    • https://static.usrfiles.com/ugd/b8c837_f93452b4e75f4affa44ca5eb0e7cccdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/vumir.pdf
    • https://cdn.shopify.com/s/files/1/0439/2848/6056/files/22294503895.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0438/8428/2008/files/learning_english_basic.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1541/files/free_email_domain.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/gta_for_linux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/83037708656.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/rugisoxagapulureraja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/carl_gustav_jung_red_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/ttw_companion_mods.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4f.bin
fd8160a126062437749c1bdb4a368919c9d8a40010170f5676a54ce44b18d0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 5112 bytes
font_01_sfnt_off00007de9.bin
0e6c03e06ea0cceae625070b860b820c88f8163d0e3f10706ce74e32f0a4856b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE9 14116 bytes
font_02_sfnt_off0000a9a9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A9 4324 bytes

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