Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5379c6913df49ea…

MALICIOUS

PDF

41.7 KB Created: 2020-08-10 00:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028dc2c66d3328dce02e57cfe5ce2dc9 SHA-1: 42b3e93b9eb3ea356103e579bd964688a5b99569 SHA-256: e5379c6913df49eabd472013660245d7aada6f8a2818452c96b2b432e8cf66de
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=chromatography+principles+and+instrumentation+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring the user to a malicious site via a deceptive link within the document.

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=chromatography+principles+and+instrumentation+pdf
    • http://files.skyrolfing.com/uploads/1/3/1/8/131872015/cccf2918c4a1eba.pdf
    • http://files.matteodecassan.com/uploads/1/3/0/8/130874205/januzavogokat.pdf
    • http://wizusa.iot-bordeaux.org/uploads/1/3/1/3/131379833/peromuvef_kesarebo_vatinakasuxani.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/dizafamojixebofizelegelux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/captain_underpants_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/72410633279.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97242885008.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/61137675427.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/xenowuzeletaxoxekobifewaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/mikeziwegulopovabesofafab.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/gugorexer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/birisubuzabudoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/kunimaguzewinigafe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/fuwojavibomiwup.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/pugurojuga.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_off00005b43.bin
eab77c5dc94d36650e9f7bace4cddbc3315703d8c39401ad0c54dd19f8b30539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B43 5576 bytes
font_01_sfnt_off00006e13.bin
04bda825172961ca3bad3f885763dcfb9699d9ff94dd629b6dbfdaf8af150a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E13 14176 bytes

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