Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc6cb76aa21e85c…

MALICIOUS

PDF

47.9 KB Created: 2020-09-07 14:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2597930f31d17b4b3c73efffaf8140a5 SHA-1: 54a5778308845ebfefe7b7cfa637657a0a73870a SHA-256: 7cc6cb76aa21e85c285f106e411dc7f7c036eac31d239bc1558beea10c3a4cb8
154 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 manual for a Toyota Auris. The ML classifier strongly flagged this PDF as malicious, and heuristic analysis identified it as a redirector link pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains the target URL and other embedded URLs, suggesting a phishing or redirection attempt.

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.link/wix?keyword=toyota+auris+2008+manual+pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/badminton_score_sheet_doubles.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/5699923447.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/sinogisilef.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/92698592970.pdf
    • https://cdn.shopify.com/s/files/1/0441/1051/2280/files/dovigen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/30737625785.pdf
    • https://static.usrfiles.com/ugd/b972d5_ba079daff1ce4914a354eb2e680b4134.pdf
    • https://static.usrfiles.com/ugd/72216b_ab816d01aa0c4161984fa710fce78745.pdf
    • https://static.usrfiles.com/ugd/3d0627_06e2ff965c7942c4b8e31bb40e9fbab5.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_8836ea5d67db4af79a5619ceb8ccb31b.pdf
    • https://static.usrfiles.com/ugd/b8c837_51b0f10196fc49fb995db2fd324f2de6.pdf
    • https://static.usrfiles.com/ugd/3eb4bd_59d71d30ed6c4ab3a4187f77d6c3234f.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_off000079b2.bin
0715663da45403662fd6d0b91e8d550d2096bc9f237c42f96389c4e29c6a82de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 5708 bytes
font_01_sfnt_off00008d0b.bin
80e67d60fc6038733e600168e15e82c723d3040704b06a8321adfb275e583cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0B 11484 bytes

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