Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b640b4279f05c2…

MALICIOUS

PDF

71.2 KB Created: 2020-10-02 02:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 486976470d50cd83bf2fc2e4f56732e9 SHA-1: 1b1cf64e8e09e05fe605c1092a117836def5ce0b SHA-256: c0b640b4279f05c22a7a1d1fe280c823919990e07b56bc91dcce3228e4282b94
120 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous embedded URLs that point to external PDF files. One of the primary URLs, https://ggtraff.ru/strik?keyword=el+criticon+fragmento, is identified as a malicious redirector. The document's structure and the high volume of outbound links suggest an attempt to manipulate search engine results or distribute malicious content through a network of compromised sites.

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://ggtraff.ru/strik?keyword=el+criticon+fragmento
    • http://files.loudsand.com/uploads/1/3/2/6/132696210/a6f5922.pdf
    • http://files.badshahdesign.net/uploads/1/3/0/7/130776196/dad6cae2012c4b.pdf
    • http://nijemibi.sliceoheaven7.com/uploads/1/3/0/9/130969449/7996113.pdf
    • https://site-1037829.mozfiles.com/files/1037829/xeweriwoneweripaz.pdf
    • https://site-1036731.mozfiles.com/files/1036731/9943196847.pdf
    • https://site-1040032.mozfiles.com/files/1040032/33995534568.pdf
    • https://site-1039618.mozfiles.com/files/1039618/guwukesexutugaji.pdf
    • https://site-1037192.mozfiles.com/files/1037192/jusawonatinitonunadu.pdf
    • https://site-1038690.mozfiles.com/files/1038690/fuvifigebifinedamofato.pdf
    • https://site-1038541.mozfiles.com/files/1038541/dedoluzofobatixade.pdf
    • http://zubexaza.redbloomcenter.com/uploads/1/3/0/8/130873851/4832096.pdf
    • http://files.mercymagnified.com/uploads/1/3/1/0/131070674/meviki_telekum.pdf
    • http://files.amandacasale.com/uploads/1/3/0/8/130874161/8576d.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_off0000d740.bin
fa895831e6737544a8cf0f8b8f0cb41e7427e0ec7266c3d5b085cc1e4089d540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD740 4980 bytes
font_01_sfnt_off0000e81f.bin
205498d1699c689bc5e014acf47b1ba0a25f1dbba91b878e3158bf5a50ab58f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 11704 bytes

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