Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a38df5203dd8ae…

MALICIOUS

PDF

53.1 KB Created: 2020-08-26 22:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27aa98c6b19b4a60e9346d9d8dcac454 SHA-1: 5c420c9b790e068b92656d4bba098f5be3d97b32 SHA-256: b6a38df5203dd8ae3bc8f6170b06c9506ff2121f1d96b62ebf04fc00166c2d18
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click on the malicious link.

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=la+jeune+france+cholet
    • http://kumolon.zollaliebermangallery.com/uploads/1/3/1/8/131857334/5013479.pdf
    • http://files.judithannabramsproductions.com/uploads/1/3/0/8/130813645/200437434f.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/texoti.pdf
    • https://cdn.shopify.com/s/files/1/0463/0672/1957/files/oracle_incentive_compensation_cloud_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/wofifujovadirep.pdf
    • https://cdn.shopify.com/s/files/1/0458/6438/6713/files/71861060629.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/canciones_faciles_en_guitarra_acustica_para_principiantes.pdf
    • https://cdn.shopify.com/s/files/1/0464/6276/3160/files/pawexigifiwazatolo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/32912273062.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/27320047696.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/55588435186.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_off00008548.bin
de91e15e7e16fe8c9e334d0a20182d1fd3a7c357e5d19e299d354999182e6723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8548 4808 bytes
font_01_sfnt_off0000959c.bin
5be8d16fe5816c18c9a1dd582e5aaf10f875669487658acae05d7d54f347d0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x959C 16372 bytes

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