Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98c049e5c606c8b…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 15:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a97f811c363194f1d53b59e49b84211c SHA-1: 6845eb45bd6473d09aaa516775420cfd134baf19 SHA-256: f98c049e5c606c8b93096317108f152508cec2c01adba05365f44a34afadb666
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=las+voces+blancas+de+elisa+soteldo+c'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click the malicious link, which likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/wix?keyword=las+voces+blancas+de+elisa+soteldo+c
    • https://cdn.shopify.com/s/files/1/0435/5653/6475/files/31233873846.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/garment_costing_sheet_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/bajemabunuruwozepi.pdf
    • https://static.usrfiles.com/ugd/b8c837_c17d130facb3441690e2030855741e61.pdf
    • https://static.usrfiles.com/ugd/ad2ade_64f8fa2f824a4de58c74f0dba0726e9c.pdf
    • https://static.usrfiles.com/ugd/e4ff69_c916952fcb5a430a946bb8b8d5691eda.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/tesofatot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/2863059457.pdf
    • https://cdn.shopify.com/s/files/1/0435/3697/3983/files/45111894013.pdf
    • https://cdn.shopify.com/s/files/1/0434/1694/4807/files/fexasezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/bosch_logixx_7_washing_machine_manual.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_off000057f7.bin
26b55cb5e73922f2e310efc3c1caf2fecdda4c3c5ef15256298aeaf76bef2ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F7 4976 bytes
font_01_sfnt_off000068f5.bin
3d234af2dddfca5c3c719c3c5ceac453285f461401babfd7d7c92c30a354cdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 11044 bytes

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