Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bb9dff8dc8d751…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 04:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182f1a9ee2479ec8c3dec51a10b913fa SHA-1: 4472a0cea6d6c554d00580bc6b547b6277589ff2 SHA-256: b8bb9dff8dc8d7512a8db850c445f585b3735518dc1f3492d4d5b130500cd884
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking Shopify URLs, suggesting a lure or distraction. The primary attack pattern involves redirecting the user to the malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=maldad+mecanica+y8
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/3908303044.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/2014_mercedes_e350_convertible_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/31490084543.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/31993102183.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/28572420864.pdf
    • https://static.usrfiles.com/ugd/b8c837_77c4971fca9f41638db2f3f9bb6d221b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b405fb8ba84b7eadd8756f7b612aad.pdf
    • https://static.usrfiles.com/ugd/d54300_ea6287ca70ef41ca91fc0ec55163ec00.pdf
    • https://static.usrfiles.com/ugd/b8c837_151aff1792c94ff3a16daf69e5b74ff7.pdf
    • https://static.usrfiles.com/ugd/b8c837_a60104e521124fb1bae5ac2a736543af.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f540c36f1c48febaffc0d2ab13633a.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ced84cf33f4380a7f992ef97d4d2bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b48bc90b04548f5aeea4302140446c2.pdf
    • https://static.usrfiles.com/ugd/d162e3_7d3f375b949f4a179b6ec68220ab3b60.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_off0000527f.bin
f792f9e1013c2e2f60c0f0e43c65006cc6a4380c9622ab2a88da1f9fdf117cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x527F 5112 bytes
font_01_sfnt_off000063db.bin
2135ec8d84c62b0a68e0dc642261244288dcb0b922f9dd92b316e37751baf62b
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DB 11348 bytes
font_02_sfnt_off00008913.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x8913 16092 bytes