Malicious PDF — malware analysis report

Static analysis result for SHA-256 4652771b5c30e5e0…

MALICIOUS

PDF

42.2 KB Created: 2020-08-01 12:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcbabcb626ff0e6e6a7fcf354a1b2896 SHA-1: cd36ccdd01264a9b62d2b1c69e211e0b67d03491 SHA-256: 4652771b5c30e5e04f39f723c95f826747250ac2b501d8d76d4a2f1f092cee35
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is designed to redirect users to potentially harmful content. The document body also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify-hosted PDFs, likely to manipulate search engine results or distribute content.

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.com/pify?keyword=kenmore+dishwasher+model+665+user+manual
    • http://files.preparepublications.org/uploads/1/3/2/8/132814898/761c0a10dfa.pdf
    • http://files.parentfirstcouncil.com/uploads/1/3/1/4/131452958/wabuwob.pdf
    • http://files.sarinataylor.co.uk/uploads/1/3/1/6/131606758/cf3b3fbe4.pdf
    • http://files.swsection.org/uploads/1/3/2/8/132814355/961000.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/56549650185.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/77643804888.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/putoru.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/togovebiwupadonemojumuged.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1273/files/77548407893.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/nopesexisovulo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/novujafuvaxuzotaruj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/93353665209.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/82007535413.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/37693068346.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/gebonixomototexuwefexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/tepezesul.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_off00006607.bin
d346295aa47556045e75560f5dc948fa7dfa49150feaa301fd38211ad1bfb7c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6607 5404 bytes
font_01_sfnt_off00007857.bin
a1497a804ed547e69c5836b127b94d2ce05fb00778b3ec7f26448ad0abb3caf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 10768 bytes