Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80a4938d231df6a…

MALICIOUS

PDF

42.3 KB Created: 2020-09-20 03:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c438740f61116136295ce1e829004b2 SHA-1: 381a5090db57b086af58feb5cd33a690a9474c02 SHA-256: e80a4938d231df6a56ac5ffc2016fb146fae0fed40886e577994e04fc7bdfe2e
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, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=ubooly+games+dino+run', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to benign content but serve to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.link/wix?keyword=ubooly+games+dino+run
    • https://443a664d-5d62-4700-afb8-cb65f7b79794.filesusr.com/ugd/a32c20_829bbbd0ffbb45a3ad3fe9b710b5a5d0.pdf?index=true
    • https://a15ef5e8-bca9-4908-a65f-9eae6c28925c.filesusr.com/ugd/ca9b0a_12745c142eb944bbb21adf117162ca3c.pdf?index=true
    • https://79e5d964-1dba-4b35-b9e7-37dca2b8a330.filesusr.com/ugd/5fd5c1_e072c7fdf69b4bbda1bd34afd8f6eb85.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/excel_macro_sheet_exists.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/gewiwoxumomifo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5362/0136/files/dupabatekenabozitosujij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/tokasu.pdf
    • https://cdn.shopify.com/s/files/1/0444/8839/2871/files/happy_birthday_tagalog.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/murray_riding_mower_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/tiweri.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/87219065060.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/53748664134.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/blastoff_iptv_apk.pdf
    • https://609ba396-58ee-4eba-b446-3d42f1c47079.filesusr.com/ugd/880a7e_c3f2a0e02e6f4032ac2b4c43347901ad.pdf?index=true
    • https://cb778c77-5240-4366-8bc4-556782d3ed65.filesusr.com/ugd/575fb0_14339e37bc5740a48687f46f3fd4f75d.pdf?index=true
    • 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_off00005858.bin
11d825597d5995a1e3e916366d8bc3d152f4c419aa3cbd94e2b1a2c7be7ed3b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5858 5180 bytes
font_01_sfnt_off000069d3.bin
35bdb71483cc5743e7d97eddb346a105036b9a4762f5c936c2047edd676fe184
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 10720 bytes
font_02_sfnt_off00008e78.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E78 4324 bytes