Malicious PDF — malware analysis report

Static analysis result for SHA-256 f058a25bd12c0974…

MALICIOUS

PDF

39.1 KB Created: 2020-08-07 14:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c3e52c848a70a3edda336930a4f533 SHA-1: 6cfab39e4aa94ad1d57e8cc59d046dc29ad9be10 SHA-256: f058a25bd12c0974f5275ec0c65c007a1d00ebbe50d8059b00a59ca2994ba629
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, 'https://ttraff.com/pify?keyword=english+grammar+exercises+with+answers+for+beginners+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the same URL and other PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=english+grammar+exercises+with+answers+for+beginners+pdf
    • http://files.mattkinsell.com/uploads/1/3/2/6/132683069/8888557.pdf
    • http://files.salemtennisandswimclub.com/uploads/1/3/1/1/131164350/kanibudet.pdf
    • http://files.shandeezcollectiv.com/uploads/1/3/0/9/130968984/kewugifo-pulodabimog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/tenasorosegonojerivo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/92311960937.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/47750729369.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/notiregegur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/54114061528.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/tegijozabijeza.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/79193490270.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/41135067269.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/48449011760.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/43706656740.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_off0000584a.bin
6d61898267918acedfa040ee0c9652789af3c50857a1ceda58d9d486e774caf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584A 5828 bytes
font_01_sfnt_off00006c0a.bin
b4d425ada0d335211093df82a6962c50170ef4412e940d04e6a29df4ff75ced2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 10388 bytes

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