Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eac5a4c096dc29b…

MALICIOUS

PDF

67.7 KB Created: 2020-08-03 16:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba130281ed3a2c0bcab379fe1b6e2721 SHA-1: 4a3f3f68a082e35d66a47c88286bae0214c09415 SHA-256: 7eac5a4c096dc29b8aef7c9d8fb6f72a06035fa36f41e991f712b0c1e64b0abe
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, and the PDF structure itself does not reveal further malicious intent beyond the embedded link.

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.ru/pify?keyword=browser+open+pdf+in+new+window
    • http://files.bethlehemjc.org/uploads/1/3/0/9/130968942/walidu_rorepuki.pdf
    • http://wumakesof.vitalvittlesfoodtrends.com/uploads/1/3/1/8/131856919/ac8443.pdf
    • http://files.lamatstudio.com/uploads/1/3/1/3/131379718/123f492.pdf
    • http://files.tootleconstruction.com/uploads/1/3/1/4/131408209/5cb15ca60fe.pdf
    • http://files.letspaintwithauntdeb.com/uploads/1/3/1/1/131164039/3912391.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/74884355951.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/88908835314.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/23066066654.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/virenelifelumotijelen.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/xizavebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/25734594081.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/kibafisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/tupukagipurisujudiko.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/wirebiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/ruzut.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_off0000c18d.bin
b71ec957ccb5830fec79e9fd277da2f072b46eac781386cecfe4fd6b77eedce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 4936 bytes
font_01_sfnt_off0000d27f.bin
6bf171fe2209b971498c8b023f611252a612a5e86a4d9b66e44d0ca96543ff58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27F 15144 bytes

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