Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c4d3c465dc3232…

MALICIOUS

PDF

48.1 KB Created: 2020-07-30 13:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15810bb6a9197601d56ce49bfbf31760 SHA-1: 8ffeaa6cf6d7c28cd34a558e44aa0d0fd6a1ad9d SHA-256: 51c4d3c465dc3232f14c2e77301ff4498c66b3157885e34732bf30c39af0df76
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector service (ttraff.ru). The ML classifier strongly flagged this PDF as malicious. The presence of numerous links, including those hosted on Shopify, suggests a link farm or SEO poisoning tactic to lure victims. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristic firings clearly indicate a 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.ru/pify?keyword=blurb+definition+pdf
    • http://files.condodocsreview.com/uploads/1/3/1/6/131606261/7348451.pdf
    • http://files.hoopspulse.com/uploads/1/3/1/8/131856076/120415.pdf
    • http://files.alissajacobscmt.com/uploads/1/3/1/6/131637308/lapolov.pdf
    • http://files.fiorillobuilds.com/uploads/1/3/1/6/131637701/7953330.pdf
    • http://files.cosmiccacaompls.com/uploads/1/3/0/7/130738722/buremika.pdf
    • http://files.fiorillobuilds.com/uploads/1/3/1/6/1
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/71267226583.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/piraxuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/28485856191.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/povapefofokogidi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/duzimedeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/79755077804.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/xisupusebawetatemevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/voragefadupiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/xeniwosovusasidam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/49674007360.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/55279283070.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/20213756731.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/rofovufuzetidafep.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_off00007cf9.bin
e8096e52082b3b533cb3876f148090fa5d0a20491c8f202ccdb360d285f3314d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 4716 bytes
font_01_sfnt_off00008d07.bin
2fa93057487318e929f722b804008ccfb6b709add39a086799e54fc0d73196ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D07 11116 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.