Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f0370b6c7953de…

MALICIOUS

PDF

35.2 KB Created: 2020-08-29 20:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9de95eb1440c87ee32088a4c1e456e01 SHA-1: 02df0c40e688dec8b97e0b246ece9f4bc51fa9fa SHA-256: 69f0370b6c7953de3d232ae4b27f01081afb9085109a5d2ad5b186be1e4e09b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/wix?keyword=elite+platinum+8-qt-Schnellkochtopf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating its likely purpose is to direct users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=elite+platinum+8-qt-Schnellkochtopf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e5cbe5_908caefca20d449aac9f418ed1b59e7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae5f892deb4240efa3521ac7d198d0d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_827da922098545088a16e3430e65f54c.pdf
    • https://static.usrfiles.com/ugd/eda9ba_78958369f7804e00b938ed03ad5f39b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0c90cec36e9447080397cc238479b82.pdf
    • https://static.usrfiles.com/ugd/b8c837_93d65f0bb7244ba693c62d5be9983a4c.pdf
    • https://static.usrfiles.com/ugd/374ce0_5f38027953e44364af9aac344ef95625.pdf
    • https://static.usrfiles.com/ugd/01bc73_39eee7f6b94945de9a700a029c50a4d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08a0134108a41e787762ba4e8b11739.pdf
    • https://static.usrfiles.com/ugd/b8c837_623f75766f324200b3bd82866b3447ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_a91112e3b6754d5aa19605962e642718.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d4d209f396f42198391934567b9350f.pdf
    • https://static.usrfiles.com/ugd/b8c837_58920cc15e0a48b4b9f9f191845df1f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b224d8e76dea45cda904ec41700dd946.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_off00004d1f.bin
05fdd73745aff833d327b995dbc12e911c8bde95f42f9c35a67a9fb35c970036
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1F 5552 bytes
font_01_sfnt_off00005fec.bin
63bb9535581678ec073bd005bddf76a1c4c5021297c8c8648c697d91d04cb5d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 9372 bytes