Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00ff52a9f9f08f3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 19:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce01dba22732000a8a57f9eb0ba8f29 SHA-1: 5d7adc6c34c67dc9f66022d1bd75e584f1c1038b SHA-256: f00ff52a9f9f08f363dc4c54d9cdbb8b96643ad0afb64c6ee54ee04b81ad1dbc
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign documents. However, one critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final malicious destination. The document body also contains a call-to-action phrase, reinforcing the lure. The primary attack pattern involves a link farm technique to disguise malicious redirection.

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.cc/pify?keyword=6th+grade+grammar+worksheets+free+printable
    • http://files.michaelmillermemorialfoundation.com/uploads/1/3/0/8/130813645/1749627.pdf
    • http://files.monicaek.com/uploads/1/3/1/1/131163859/638f00df9.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2821/files/html_tags_list_with_examples_and_description_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/4295388645.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/pigigowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/i_dreamed_a_dream_piano_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/lemajipabagotaminalud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/baratunde_thurston_how_to_be_black.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/15969227631.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/74922646907.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/vawevipaluw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/fozig.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_off00005f6e.bin
48a240a53850b890f6afb0af3d3a1eae9be3644538d3b79362b1a4df6965c1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6E 5808 bytes
font_01_sfnt_off00007320.bin
268794f24137bf4149a48c23b59ef12595434d7c31cf636a92df239ac8e4a020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 10352 bytes

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