Malicious PDF — malware analysis report

Static analysis result for SHA-256 d649414edcb5a54b…

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 22:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bad18d8833dc94941a19d1a41cb68a6 SHA-1: 40f0e223932bc78b78217a00fca0a22039d3b60f SHA-256: d649414edcb5a54b3d39732f14d67c8c3c31466cff87fde8a41f3b514306e155
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, which points to a URL disguised as a game download. The document body explicitly mentions "cyber hunter game apk" and includes the malicious URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious payload. The file itself is generated by wkhtmltopdf, a tool often used for creating PDFs from web content, which can be abused for malicious purposes.

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=cyber+hunter+game++apk
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/91619665312.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5402/files/vufolibomixufusotov.pdf
    • https://cdn.shopify.com/s/files/1/0443/1472/2460/files/lean_six_sigma_black_belt_certification.pdf
    • https://cdn.shopify.com/s/files/1/0455/4617/6677/files/general_mechanism_of_fever.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/beautiful_in_white_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/20892409395.pdf
    • https://static.usrfiles.com/ugd/18f527_5307e22a9e3b4a0e9d727e1ad3492e02.pdf
    • https://static.usrfiles.com/ugd/0df15e_75206f396c5f4549a23a09d2b6c31e27.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/3781338819.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/devaliz.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_off00005970.bin
f847cf2d37be40125fab5828a7edcc37d91f9c449b6b48068b190cb9a68f0b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5076 bytes
font_01_sfnt_off00006a8d.bin
adf08805a3e3828e475561a7cefebfa938cdd0ae7c4bc0162a37fbed54211408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8D 10000 bytes
font_02_sfnt_off00008cc7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC7 4324 bytes

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