Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a25e5cdb24a1991…

MALICIOUS

PDF

38.5 KB Created: 2020-08-01 23:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0861eb83d178aee7ff6ab51d448c9de SHA-1: 6dcb72f77a37c102559c3ce7538ff11d65f5b575 SHA-256: 1a25e5cdb24a1991947165a0a01f51424c5f74778ebece160d3f59bb6513da78
150 Risk Score

Malware Insights

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

This PDF document contains a mass external link farm, with a primary malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=bunger+surf+cam'. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF files hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a harmful destination.

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.cc/pify?keyword=bunger+surf+cam
    • http://files.splitdecisionimprovcomedy.com/uploads/1/3/1/4/131453950/b3ebb8611ac.pdf
    • http://files.choistudy.com/uploads/1/3/0/7/130739802/be9a1b26421e9e7.pdf
    • http://files.thelionschoice.com/uploads/1/3/1/0/131070450/fagasez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/classic_mage_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/57104643177.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/sajojasaliridevatug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/john_deere_2020_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/63284527797.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/98051049967.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4313/files/66934987892.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/64004748341.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8324/files/mutidabiginizizote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/98142925580.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/13056705107.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_off000058a6.bin
34727c29e9a4baac9c07700c1b063224155553185f06a85523aa38fdedc6072c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A6 5216 bytes
font_01_sfnt_off00006a5d.bin
ea4fe3ab5517bd35c3452fc4f15a656b3828f667101d75a2d22f179f6b0da32f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5D 10236 bytes

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