Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa6769124bf0eb5…

MALICIOUS

PDF

49.2 KB Created: 2020-08-14 16:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4a5dd5e58b28263b74799c2da9a0df9 SHA-1: 66b99603fba78b2ed8e9ba21fa239be449384591 SHA-256: 7fa6769124bf0eb581e54a971017aa9369968a48ccaff734b4325e716d1d1ebc
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a malicious redirector. One of the primary links, 'https://ttraff.com/pify?keyword=ankush+songs+free', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=ankush+songs+free
    • http://files.skinwiserx.com/uploads/1/3/1/4/131437924/ninumixoduzod-rijomi.pdf
    • http://files.designershousewinchester.com/uploads/1/3/1/3/131379296/wiborigem.pdf
    • http://files.brightenthebrain.com/uploads/1/3/0/8/130874046/jogunodemuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/lituxobebabajepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/nevigonewomusor.pdf
    • https://cdn.shopify.com/s/files/1/0454/5613/0200/files/handbook_of_argumentation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/gakarabunile.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/ropunixabimivenen.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/27095391544.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/wupavisaromewosijakosi.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/activador_office_2016.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/
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/ropunixabimivene

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006680.bin
b102457372467af9d2f11e05d66676eeb463adbe9a0ccd616bb542dc946d447d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 4840 bytes
font_01_sfnt_off000076f4.bin
2ad0145454127e886049426a10e6a45f4d01f6f11aa59a5fec2d7019445fe33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 14060 bytes
font_02_sfnt_off0000a29e.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA29E 16204 bytes

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