Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67ec724ca1b25fe…

MALICIOUS

PDF

45.8 KB Created: 2020-08-23 17:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc70558195ad6eeca7ad1b21d7b6cb3 SHA-1: ef877c68c40cb3f53b0b70293f756b47b1e6ab93 SHA-256: e67ec724ca1b25fef9252a3ff65f255baf3158a5d1090e3ec28d6603d4acc0a5
152 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link disguised as a vacation itinerary template. The ML classifier strongly indicated maliciousness, and the PDF contains a large number of external links, many hosted on Shopify, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.ru/pify?keyword=vacation+itinerary+template+word, which is likely used to redirect the user to a malicious site.

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/pify?keyword=vacation+itinerary+template+word
    • http://files.freedomvalleyfarm.com/uploads/1/3/0/7/130776599/4a69028.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/50547330627.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/limuvorusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/sofisaworojolabaguwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/fijuxiwokexatufejebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/pentonville_prison_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/awaken_the_giant_within_archive.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8437/files/73753201911.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/farapef.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_off0000772a.bin
30c482c58e46f90ceb0f3b2dd5f32f95163e719e7400d841732f7041cc79bb5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 5200 bytes
font_01_sfnt_off000088d0.bin
d8a6a0072d89e2135cedd31ca6913c35ac5152fabf9618efdde7ea28e1ec345f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D0 9828 bytes

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