Malicious PDF — malware analysis report

Static analysis result for SHA-256 794eaeaca3b37c3d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 11:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01973b25da26580b7b5d0a2d09a47f76 SHA-1: effaf85769ed455cdcaf630762d15c51968ccc9c SHA-256: 794eaeaca3b37c3dd83c8bffb1975d41e8afcf60f2ffed599207015f7ef51e0e
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector, 'ttraff.com', which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous external links suggests a broad phishing or malware distribution campaign.

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/wix?keyword=mm+food+zip+mf+doom
    • https://static.usrfiles.com/ugd/b8c837_4f942ffbf94a42d18c802cc273553ebc.pdf
    • https://static.usrfiles.com/ugd/b8c837_faf09e797d1f4b0fb87d35e76c5b673f.pdf
    • https://static.usrfiles.com/ugd/38bf1f_0d9d50ab15a94459bea9b9b783c10886.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fcd7a7dfbf247f6a5a21191dec8e39c.pdf
    • https://static.usrfiles.com/ugd/086daf_4509afb9f96d420e8a1334d9f80fe6b5.pdf
    • https://static.usrfiles.com/ugd/0049ca_b3de08e30e7d4ab1996de2bd2b12007d.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_c62797ff6519474c9826cd3b94c6b945.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f6b10ce3454c0db85ad522e47a3c50.pdf
    • https://static.usrfiles.com/ugd/d1d005_1d03724189b1402ab1a1c0b6be8e01b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eceea9b7583450080bd437e401494f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a091968c7d047ca85c15014fd2c06eb.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_off00006c99.bin
3cfbb8c791b5c23f85e8f7df2883e7929827a77f67b228c5248b0a71991da7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C99 4724 bytes
font_01_sfnt_off00007cb6.bin
a9f09268f934ef547897432d1ad2e0929bb974750da62e5f4dbd444237bc5551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB6 10576 bytes

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