Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b19544c8334989…

MALICIOUS

PDF

47.2 KB Created: 2020-09-09 04:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 833db65984501bb039ae6f6d60e4b1dd SHA-1: 0e47f3ca5e10851de09fbeb4211712c7c6164d86 SHA-256: 01b19544c8334989458d6facd58fea7c291989e3bec5e4b61c6224697b587d8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to manipulate search engine results. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is used for malicious redirection.

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.me/wix?keyword=aggregator+transformation+in+informatica+with+example
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/58a813_0474e84923c94c8c9553439a3675c607.pdf
    • https://static.usrfiles.com/ugd/4dbf3f_6413ae7146f64a3faf00442070b6a813.pdf
    • https://static.usrfiles.com/ugd/5a1791_661b1bbd113b4f22a5488f91ebea6aa6.pdf
    • https://static.usrfiles.com/ugd/b42fd6_9ce619e5f24f4f0284113db379c088ca.pdf
    • https://static.usrfiles.com/ugd/07e02c_353cab9ba3a94c26985ae0d11e300cab.pdf
    • https://static.usrfiles.com/ugd/24deb6_86850679eb0947ddb73c94e4e7492df5.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_4c6d7c9853c64ac8b477d6ad232817b2.pdf
    • https://static.usrfiles.com/ugd/89602e_eb75cfa5a6dc4fe586732af12901a36e.pdf
    • https://static.usrfiles.com/ugd/98e298_a995efb7dc774a7391534ecec314054a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17f5444ee2445dbbd3d9962f5a52bed.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecca9774b4e14120a00f63ae7b267244.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/60e703_1d820b27f49645d6897cf3ff63fa861b.pdf
    • https://static.usrfiles.com/ugd/c4b402_5c0da6b1495c48f2ba346850071da2d2.pdf
    • https://static.usrfiles.com/ugd/eaf48f_4c9fb11eb89f41ebbd4ec3ed98539b82.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_off00007903.bin
2240cf30bf5b34397683f601cbef2c09f2f4a355b191daac97e1a31ab1ef54df
pdf-font-stream PDF embedded font (sfnt) at offset 0x7903 5580 bytes
font_01_sfnt_off00008bf3.bin
bc31816663174c4d1b69ad270e3c6234d33327b050424f561123390105d1da7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF3 10384 bytes