Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a007c0575c109a…

MALICIOUS

PDF

34.0 KB Created: 2020-08-01 17:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 747015313a7b544b96983719703bbf4e SHA-1: 68f1b86646c80f93116be3bebb283d44148b1a80 SHA-256: f1a007c0575c109a11fe716443413c9ca3f6d18a556d15110c7bac4b3a90cf1c
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of embedded external links, characteristic of a link farm used for SEO poisoning or to distribute malware. The primary malicious URL identified is https://ttraff.cc/pify?keyword=is+nyannyancosplay+a+guy, which likely serves as a gateway to further malicious content.

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.cc/pify?keyword=is+nyannyancosplay+a+guy
    • http://files.stcloudpantry.org/uploads/1/3/1/1/131163738/gilagozikefarede.pdf
    • http://files.enelectuas.com/uploads/1/3/2/6/132695472/wepen-rododiwavu-xuvasosadatoj.pdf
    • http://files.cvma32-2.com/uploads/1/3/2/6/132681579/468494.pdf
    • http://files.gretchenstelter.com/uploads/1/3/0/8/130874368/mejalup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/19389935673.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/49097046232.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/50594339708.pdf
    • https://cdn.shopify.com/s/files/1/0434/3401/6924/files/microsoft_document_imaging_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/vadotewasar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/fitewusunajiruku.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/52212940716.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3873/files/73882713214.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/bunejegone.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7400/files/60021511371.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_off00004727.bin
7b59ec4858dbb1847f79de8a33cd4d09fb5a3f435c28bfaf202a3ac98a382b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4727 5044 bytes
font_01_sfnt_off00005872.bin
b26103b4746965b442409218ba25ce2c26107421cf9f519a51ec6b08ffe90046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5872 10260 bytes

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