Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19b8a1985d54820…

MALICIOUS

PDF

46.3 KB Created: 2020-09-08 17:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 833dfdeedf16b0cb1bffa79957dc65df SHA-1: 0f640f96345d00f415121b32363b19cb8973c77c SHA-256: c19b8a1985d54820a9456b6f78127441c38d63ee4aa5d4f0fa53ea40e4b6ac5d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to a URL designed to lure users with a movie-related keyword. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a deceptive tactic to encourage clicks. The primary malicious IOC is the redirector URL.

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.link/wix?keyword=singh+is+king+full+movie++filmywap
    • https://static.usrfiles.com/ugd/c3f59f_ff7a8940642e4924bb9a079e57127114.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef403b0c606d477e9fae24e17ab10a88.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_5da43d9106904c508b28b421e6b463e8.pdf
    • https://static.usrfiles.com/ugd/83b1b3_8c775538784641a5902cad29dc805ff2.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/13016471887.pdf
    • https://cdn.shopify.com/s/files/1/0438/6557/1493/files/xiwexijujotekuwupesavot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/42278952435.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/naxunigoxiluri.pdf
    • https://static.usrfiles.com/ugd/61f964_0a8411846a424ac1b5b9816013e79d1f.pdf
    • https://static.usrfiles.com/ugd/4d6844_357ff052a63845d3bf9650ebb5a2432e.pdf
    • https://static.usrfiles.com/ugd/8d0191_5d8dfc2f602840d584c87838c0f79e5e.pdf
    • https://static.usrfiles.com/ugd/67e251_e6e8a586cf92498085f8faeee90364fd.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_off000061ef.bin
66c16400276445e77232cb2d99ec7e323fae532a377389318a9005838822d90a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 5640 bytes
font_01_sfnt_off00007519.bin
cda945981b844f3276b0dd7d2650803e13254f3cb3b5d932aba5a427260fc6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7519 9876 bytes
font_02_sfnt_off0000971c.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x971C 16164 bytes

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