Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f3d7c1dfab2272…

MALICIOUS

PDF

39.0 KB Created: 2020-09-09 23:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cfa37f141a64be811552964350888e4 SHA-1: a154ac8a3d867414feffa79ae2d5869505e39478 SHA-256: 91f3d7c1dfab2272b549ab19049bcbf62a8bd1af33303ce21d75d8f33159c952
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link farm. The primary URL leads to a site with a keyword-rich query, suggesting a lure for search engine traffic. The document body, though heavily obfuscated, contains references to the primary malicious URL and other PDF links, reinforcing the malicious redirection intent.

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=yajur+veda+malayalam+pdf
    • http://files.doctorkate.co/uploads/1/3/1/4/131455903/nomomamikiwabobub.pdf
    • http://wewiza.duesouthstore.com/uploads/1/3/1/3/131383483/d3c750e4.pdf
    • http://files.stetheldredasistersandfamily.com/uploads/1/3/1/1/131164519/wiwado.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/21519330701.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/63484705809.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_d2d648a2033f4a86a3fbf9fd02d88f33.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a66ad919d34360ae6ce3c67c1ee1a9.pdf
    • https://static.usrfiles.com/ugd/60933b_5426b59ce7014ec0894436bcb3c48f2d.pdf
    • https://static.usrfiles.com/ugd/0a052f_3e58c0021fcd4903b1dd4cee5c102737.pdf
    • https://static.usrfiles.com/ugd/d01287_2b2aa72c0cda469ba0cd76d4c8894229.pdf
    • https://static.usrfiles.com/ugd/50c35f_f00f9c0922a24b21a88f06522df5d927.pdf
    • https://static.usrfiles.com/ugd/1e32c2_7ebe840b2c2a4ef69212c673bf83e264.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_off00004810.bin
3ce71b73046b4a3335508a9c4eda2b99dd3ea7180c31dc9f0f80789c8f3d82d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4810 5208 bytes
font_01_sfnt_off000059bf.bin
d167b51442b7e597914fe137b8244caa2af1e6de905c14a6075af5e18d0741f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BF 3944 bytes
font_02_sfnt_off000068ec.bin
0ba171889d6d5ca977c15e2a7c8f82cfe7f67a17821326d25f17bd154486a1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EC 10772 bytes

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