Malicious PDF — malware analysis report

Static analysis result for SHA-256 f346ee29896efaee…

MALICIOUS

PDF

50.8 KB Created: 2020-08-19 18:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e24f2303e438ad71f0dbfba19845324 SHA-1: 7dcb118d13677e23f74d55de01a49d2f71b63092 SHA-256: f346ee29896efaee7424e6ed666a4e77b9afc910b9f60b99aefdcf733d515fc6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains, likely for SEO manipulation to increase visibility of the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=aramaic+language+course+pdf
    • http://jetimun.stilllifephotog.com/uploads/1/3/0/7/130739615/gixesozupiwel.pdf
    • http://files.alphaomegaassociates.com/uploads/1/3/1/0/131069869/75164a56.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/xokajagiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/zodudeginukiwefimif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/gitivusawita.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9915/files/86397794158.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/bottom_of_the_pyramid_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/cisco_sg350-_10_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/pavunuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/central_limit_theorem_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9868/files/pimunawejut.pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4818/files/bahrain_economy.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/1/0428/9835/84

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a10.bin
509438bc02d4f893e927658b2d5fce366726a6779467e1adfc78f9035a2d0f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A10 5464 bytes
font_01_sfnt_off00008c84.bin
c78a94f7f94bc10145e8567bad2e4aa859f50183bafb070cde11c07edf11b324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C84 16816 bytes

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