Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2fd894a9c31b513…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 14:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2303361cb438124e5c9d7b66d4cd6b83 SHA-1: 957596f359c1e5cd383d80d9c1068519c82b6d44 SHA-256: c2fd894a9c31b513064fac47008e44bbbb371d098cd5f8cc09d732ddb29f4cbe
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 user manual, aiming to trick users into clicking it. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of numerous other links in a link farm (PDF_SEO_LINK_FARM) strongly suggest a phishing or malicious redirection attempt. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded malicious URL is the primary indicator of compromise.

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.ru/wix?keyword=toyota+auris+2007+user+manual+pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/wezugubawubiwowir.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/febibefalogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/wokuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/82150346562.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/pokemon_light_platinum_pokemon_locations.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/25382839662.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/firms_will_enter_a_monopolistically_competitive_industry_when_there_are.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/bewonatibozavobovaseguduf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/mawuvavileduruwigunakaduk.pdf
    • https://static.usrfiles.com/ugd/895bef_9ebf42e3418a47588aab1d2c7f6b4b15.pdf
    • https://static.usrfiles.com/ugd/c3548c_73bd6b50776f4777ae65e1cc148a6c35.pdf
    • https://static.usrfiles.com/ugd/b8c837_a245929504a444c6b1b6c2df20d37b56.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cca151932c04f19ba94db3104cbf18e.pdf
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/70611905383.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/70323346152.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_off00005a69.bin
cf990b07c211eb284e4506d3af6b7b9a4ef8d1bfb8ddb351db3d2432fcefaf56
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 5592 bytes
font_01_sfnt_off00006d61.bin
9d4ae4c8bbe69aa1e20372e1364ef321f273a3affcfd729a5426df61a21a2a96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D61 14340 bytes