Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdef9a81908b118…

MALICIOUS

PDF

48.4 KB Created: 2020-09-06 01:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f0e2a9e6c5f23ac68f375d13d4a6e5 SHA-1: ea56069f10e53211b99dc4b3472900eb929180b3 SHA-256: 4fdef9a81908b118417253e1074dc488644450c7b944a30d987dd787eb253b35
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector link to 'ttraff.club'. This URL is likely used to direct users to malicious content or further stages of an attack. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a lure to disguise the malicious intent. 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.club/wix?keyword=furious+epic+seven+guide
    • https://static.usrfiles.com/ugd/3fb742_d75ef5340f2040daa6b7d3841abe5a01.pdf
    • https://static.usrfiles.com/ugd/f63f29_cae399284a01464d82e82f1e8b7ae590.pdf
    • https://static.usrfiles.com/ugd/eb6612_9ccaf392ccd84933b939bb1826f48de0.pdf
    • https://static.usrfiles.com/ugd/8c0e65_493c4d9defba47748504a0191e6f4dbf.pdf
    • https://static.usrfiles.com/ugd/5e8de6_63329408785f479c839c1db262070d92.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/additive_manufacturing_gibson.pdf
    • https://cdn.shopify.com/s/files/1/0429/6582/7747/files/givasasodipikutozijuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/25002940119.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/tibuxevujuwotirilopiniju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/ditologur.pdf
    • https://static.usrfiles.com/ugd/5360f8_43ff0c715987405799fa7fef867294e2.pdf
    • https://static.usrfiles.com/ugd/9dda13_937310f0291146539d1ef98a9ac23ad3.pdf
    • https://static.usrfiles.com/ugd/faa7ef_af5e95b069184ee1b997278232609859.pdf
    • https://static.usrfiles.com/ugd/5e8de6_7111c19e6466472e93f499244cd3dc0a.pdf
    • https://static.usrfiles.com/ugd/ec0c41_cbb165c354c8431f88a845528704ccf1.pdf
    • https://static.usrfiles.com/ugd/c57cae_14b71f228a85452f9f3b4d8709895e8b.pdf
    • https://static.usrfiles.com/ugd/05301a_24f0a8f9a1e44b6fb12e0fa7e0bfc07b.pdf
    • https://static.usrfiles.com/ugd/6924eb_9b2313f3580c48309cfb4ed8dc0378e8.pdf
    • https://static.usrfiles.com/ugd/e8e253_d3a92186cc61494e96311914c839439f.pdf
    • https://static.usrfiles.com/ugd/b5472a_e36b611acf144646821d59a6a39861a6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac9.bin
f5fe38efc60aad8b17ab6721970f3e42ea64b232430d22e872053a26b3452e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 5012 bytes
font_01_sfnt_off00007bf7.bin
e6cd6328b5bf9f568d7919bd9cbb913ce61b961a05e6bc7f39d707c708047c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 10288 bytes
font_02_sfnt_off00009f5b.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5B 16092 bytes

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