Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53e1f90fef52d27…

MALICIOUS

PDF

41.5 KB Created: 2020-08-26 22:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2de46022a674c95909b577d86d753715 SHA-1: b9db472728732e870f576418ac33a8ed2ab1903d SHA-256: c53e1f90fef52d27e47121a477d8936cb3419c3157d1061ce24a85685bacc05c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=open+my+eyes+lord+lyrics'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on domains like cdn.shopify.com and other potentially suspicious domains. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and link farm structure indicate a social engineering attempt to redirect users to malicious 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.ru/pify?keyword=open+my+eyes+lord+lyrics
    • http://files.shopparallel.com/uploads/1/3/0/7/130776152/madabaju.pdf
    • http://zapon.doggieandme.com/uploads/1/3/1/4/131452977/midilesogof-videfetufo-bevuvasinadazi-rinaxomuso.pdf
    • http://files.jeninottphotography.com/uploads/1/3/0/8/130813601/05cc34bc4b.pdf
    • http://dejeg.deenasaundersgreen.com/uploads/1/3/1/6/131637309/ribufibipif.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/pofes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/asme_b31._1_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/baja_autoestima_en_mujeres.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/neural_network_machine_learning_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/7157/0069/files/9800383351.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/81397449478.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/antigona_jean_anouilh.pdf
    • https://cdn.shopify.com/s/files/1/0464/5004/9192/files/australian_catholic_super_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1890/files/getenazajusuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6808/files/54114007678.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/fubepizavotubeluke.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/ragifutugalogosixopakoxin.pdf
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/android_tv_browser_full_screen.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/43185772118.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb8.bin
e171266dbfafab033525807c25c66454dd2465c4c7df660b3f7b6ac8594781a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB8 5140 bytes
font_01_sfnt_off00005e1b.bin
df0a5d6aaba1450510baab8b1fdf4164fcc211a7e7ece9eacb445678b0ad2700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 9956 bytes
font_02_sfnt_off00007fe3.bin
62998b8859fb1df2e1ac6fcdfae65b333689dcb30330799491f686ce77712319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 17168 bytes

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