Malicious PDF — malware analysis report

Static analysis result for SHA-256 317e6ee75d009411…

MALICIOUS

PDF

45.5 KB Created: 2020-09-04 15:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e623c790cc7835e83fb8738ab76bd751 SHA-1: 49417331ae20f161a9c6b2e0d08b684f382a9444 SHA-256: 317e6ee75d009411c713fd9dfbb20d431b3453ce990271f44f95899db4b48f82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, characteristic of a link farm. One prominent URL, 'https://ttraff.me/wix?keyword=car+park+building+design+and+guidelines', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'car park building design and guidelines', likely serving as a lure. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, potentially for phishing or malware distribution.

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=car+park+building+design+and+guidelines
    • https://static.usrfiles.com/ugd/b8c837_668e81b89e9741bb83929efce7f71966.pdf
    • https://static.usrfiles.com/ugd/f84671_c12ecbda7db840a78706d2be27d8eca5.pdf
    • https://static.usrfiles.com/ugd/740d8c_831a001744a648c08c103fc8f1c49f34.pdf
    • https://static.usrfiles.com/ugd/0d2fda_e2a76e8fe2504e4081276a8c7ce39dd0.pdf
    • https://static.usrfiles.com/ugd/76aeb6_3b297616bbd24759aa56b69bc666a1d9.pdf
    • https://static.usrfiles.com/ugd/6a7407_9c0da701d06449f09e4d5bd05374b0c9.pdf
    • https://static.usrfiles.com/ugd/384ea4_dee85b2a86824ed59727e3ad4d52d882.pdf
    • https://static.usrfiles.com/ugd/a01749_019f8e69ab424f0e95b08e4e787c7364.pdf
    • https://static.usrfiles.com/ugd/b8c837_66a6cfa2ee224b98bf7f8cd17310c0b4.pdf
    • https://static.usrfiles.com/ugd/bcfc12_3b855c11bc4f4204b5bb38fb5d3bebf0.pdf
    • https://static.usrfiles.com/ugd/185c00_9eae9b9eeb4a4f52bdb6ba8a33da0cfa.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_225b9dbeb52548c9b9580a984dc299e2.pdf
    • https://static.usrfiles.com/ugd/a72fa8_32e15eb52d06424b82fd41b810ebcff4.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_off0000755b.bin
8bcdc53674e1c56368db8f5327da74a8e49b3deb7d76e8e8bac4ee3630f795f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 5236 bytes
font_01_sfnt_off0000872d.bin
b212fadf2ada4359212f99ea7bf292f80479da9eaec0247c6c4236961c4a00dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x872D 9936 bytes