Malicious PDF — malware analysis report

Static analysis result for SHA-256 592599733f467b79…

MALICIOUS

PDF

49.4 KB Created: 2020-09-14 23:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ea020748e13c91fee47808938f5e39 SHA-1: 4fb8c77333d5d67ac80fd3d2df3d86ee174d1a59 SHA-256: 592599733f467b79e27de79b05cc8b358eb27783d72802fa67fc024d9e1fe07b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create SEO link farms or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/wb?keyword=tv%20guide%20nuevo%20laredo', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Tv guide nuevo laredo' and the same malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=tv%20guide%20nuevo%20laredo
    • http://files.thesoundactivist.com/uploads/1/3/2/3/132303374/fugosegurotaxuwab.pdf
    • http://sumodu.britneekent.com/uploads/1/3/1/1/131164538/vubafisu.pdf
    • http://files.ithinkpet.com/uploads/1/3/1/4/131483214/sumexilav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/40026314921.pdf
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/13707045865.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/pekelarexofedexoguroduv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/89377120435.pdf
    • https://static.usrfiles.com/ugd/1df9ea_f7ac3e5a3c214f279bf3034146743ad3.pdf
    • https://static.usrfiles.com/ugd/3f80ec_328c464fe4f440e99596143887e69fa8.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_2ea7c739eec84c93b0e6878e4746817d.pdf
    • https://static.usrfiles.com/ugd/f0e51d_faaef37f42f144999b4b5fc9e5dab198.pdf
    • https://static.usrfiles.com/ugd/740d8c_3f52543bde76487bafb787c45ffa19d7.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_off00007f72.bin
59bd971f628aeb4a60398300d9e2d547c31821e15390c8d80e18dde154a3688f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F72 4824 bytes
font_01_sfnt_off00008ff3.bin
27eb6486cfa8cdecf5ddbddc3d6212c975f11ccf6197e68e22a676afe85cd7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 12912 bytes

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