Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d7d4a40ec2734a…

MALICIOUS

PDF

55.6 KB Created: 2020-08-30 12:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5011d4ee79898a995fe7c3d82cb48005 SHA-1: b1bd691377179d8ca3ae0abb6dc9682570cb5d05 SHA-256: 17d7d4a40ec2734abb6c50e2228da6a696991e63d6c158fee8481c7f4aae12a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'missing 411 cluster map pdf' and the authoring application 'wkhtmltopdf', suggesting a lure. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure and contains a link farm, likely for SEO manipulation or to host further 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/wix?keyword=missing+411+cluster+map+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e5a943_01e059220d9741739aee947b4e95b136.pdf
    • https://static.usrfiles.com/ugd/73c254_eb9607008295431d8ce911d59fd168ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_af2a928ca80a46f1a13767b78b44bd9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ced84cf33f4380a7f992ef97d4d2bd.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3408/files/pejovizefegoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/36710202000.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/96158903673.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/industrial_lubrication_oil_analysis_reference_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_5af6dc5364c24ce1a528da0d279820a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d014fd798c8423b829ce8d80b9d38f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc303731d6eb4686ac276f30f5750e27.pdf
    • https://static.usrfiles.com/ugd/06497e_44167836b9d24dbabeb83e9326c62843.pdf
    • https://static.usrfiles.com/ugd/fe83c3_cad57b34768b4d0a8cf2f06af60e7f39.pdf
    • https://static.usrfiles.com/ugd/eed56f_35583650fb944bbc97a68f30e0896535.pdf
    • https://static.usrfiles.com/ugd/77d535_4a37b028e4c24e738c9f3b59bffa720f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a961815d397488b9b84fdf2fc6b2692.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ba3.bin
dd305cf3c58775481cf9d02045f18a4af31c2a98cceb8192a9cd690745be3a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA3 5620 bytes
font_01_sfnt_off0000aeb5.bin
b436e6f6d3accc8bd06d4d6f3fd2435be95886cc925e9c9a007a08ea2d1cf3ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 10120 bytes

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