Malicious PDF — malware analysis report

Static analysis result for SHA-256 802e1ca13a90f13f…

MALICIOUS

PDF

32.4 KB Created: 2020-09-01 06:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00cee03dd3fa9d89552c35463efbe495 SHA-1: 8bf543e808156097cbbb8d5ea643d04bae350645 SHA-256: 802e1ca13a90f13f316ffd4ee5bd81a6545f6c22fc9bf7f7b3623c6259fe775a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector URL is a high-confidence indicator of malicious intent.

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.club/pify?keyword=kagan+mats+pdf
    • https://static.usrfiles.com/ugd/5b604d_d6f0cbe7249f47ebab47063b263b9d62.pdf
    • https://static.usrfiles.com/ugd/b8c837_babffb207e8143ed8cd33ab84d595b2a.pdf
    • https://static.usrfiles.com/ugd/3aee12_b2ff80912e514825b4fdd6176a85f911.pdf
    • https://static.usrfiles.com/ugd/b8c837_1379859d0ae04611b2704b36c748368c.pdf
    • https://static.usrfiles.com/ugd/b65acf_f28ed327fa004f939b29e1a059e28c9f.pdf
    • https://static.usrfiles.com/ugd/91e123_68f9d5ae0caa4392bf7a9c658119d613.pdf
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/chicken_run_full_movie_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/6806598352.pdf
    • https://static.usrfiles.com/ugd/5ed537_2ddf5c0a88db49a4be7d1edef74ad6fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad796a46abf149ef8058e49501923ca8.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3fa0ae77c684d6c86a0dba9d025c331.pdf
    • https://static.usrfiles.com/ugd/9904c2_ace190049fb7434a9c4b2263bad90091.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_off000042a5.bin
5a9f02f39fc032cda57933174c4f834c6fefa74a37b3b04cc4650a3e451647f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42A5 5200 bytes
font_01_sfnt_off00005453.bin
6586b3563ea372fdd0f1f0c5921b649fc4f0ae322f3de5cdb46e9f4de689d95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5453 9700 bytes

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