Malicious PDF — malware analysis report

Static analysis result for SHA-256 44965960a71d13dd…

MALICIOUS

PDF

41.1 KB Created: 2020-08-02 01:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd07277f6b3a0a2da751f46014442f0 SHA-1: 881efc448a017aeb42982ab2cdf9fed595b382ae SHA-256: 44965960a71d13ddb7ef9411125a8278ea54c4b7a0d77a34512ec076783105df
128 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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a reference to 'N64 roms download', suggesting a lure for potentially pirated content. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=n64+roms+download
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdf
    • http://files.5starpdrllc.com/uploads/1/3/0/9/130968968/7376804.pdf
    • http://files.tricitysouth.ca/uploads/1/3/1/3/131380480/4c47cc1ba01.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/ruzigojagurep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/dejoburonerilojogikavep.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/69005815646.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/kutisokile.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/kufakezojunuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2518/files/xopiwetunujokilugivitusiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/wefudi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/matuxexunewela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/kulibameji.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/nunoxi.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_off00006378.bin
596378f1525703b8867c67e08406d0a4d51cf2e427033d5d5608afbd4ec47fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 5272 bytes
font_01_sfnt_off0000756a.bin
e9a4dae6144593e1b0e581242f9e4fec93755ab04455cd10826c1b99570c893b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 10080 bytes

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