Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67f4a0d920084cb…

MALICIOUS

PDF

49.8 KB Created: 2020-09-06 18:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005e04dcf31b9e6a257da8fc13d0eab7 SHA-1: 1fd4ae453d6f17dfc59942186290b3f3ad0b705a SHA-256: a67f4a0d920084cb7dc91a933604c9f8954ccb93b3d9099673783d6521283797
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.ru' which is flagged as malicious. The document also contains a large number of links to Shopify domains, likely part of a link farm to improve SEO for malicious content. The presence of a malicious redirector URL and the link farm structure strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=2013+chevy+equinox+repair+manual+pdf+free
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/sefazeromofafomule.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/durevagiferesoxatat.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/phonics_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/gujarat_samachar_bhavnagar.pdf
    • https://cdn.shopify.com/s/files/1/0466/4190/5829/files/wapking_video_songs_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/vabelubopodavo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8914/0643/files/bixazipogulojasado.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2916/files/67189740233.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/zifodomuxudopesadeluvuv.pdf
    • https://static.usrfiles.com/ugd/b371d9_897348af7b654b32b77231caed17770a.pdf
    • https://static.usrfiles.com/ugd/b8c837_90c24482204c473f90c40cffbede2358.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfed4c8972d74e35ab2ed66be58ceae4.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_off0000827d.bin
5c7d4204b1d98340d1f53d9c3a804947c7fedc31da94548ea55686cd429d075c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 5968 bytes
font_01_sfnt_off000096bc.bin
ad4594a78a67f2a3229c0d7c0440d2cb60a5be192f7f8f17a09f3de42f3671b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96BC 10352 bytes

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