Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c1bf3e37933029…

MALICIOUS

PDF

40.0 KB Created: 2020-08-02 20:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f743900851218d605b34e37b9343540e SHA-1: 64b17064fa2393adb5d581f474744bab318d0daf SHA-256: d3c1bf3e37933029fdfd3514d5cba75fe004bec54620aa1e23e7dcc86c4c269e
160 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL and a reference to 'minecraft mod rejections', suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. The 'SE_CLICKFIX' heuristic further supports a social engineering attack aiming to trick the user into executing a command.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=minecraft+mod+rejections
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdf
    • http://files.neurodiversityconsulting.org/uploads/1/3/1/4/131437474/5405776.pdf
    • http://files.indiancreekwma.org/uploads/1/3/0/9/130969428/5885755.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/mufadaxidezekerewole.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/internet_download_manager_full_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/5967349813.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/powalitewitojoso.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/61768684582.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/juteto.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/nsfw_discord_servers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2578/5255/files/40873885947.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/vaxiwilapubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/sokisaseja.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_off00005e99.bin
2f7046efd110033198bfd5271c4256c92867139b56f8c15b914fa2f04f73833f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 5216 bytes
font_01_sfnt_off00007052.bin
994c4d37f437b5b3805e486018d48531e5267e387feab201b13056349fe4e787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 10336 bytes

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