Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1ca1a0740e3dd7…

MALICIOUS

PDF

65.5 KB Created: 2020-08-29 05:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2733ff7eb6d9963c234b30da586e10 SHA-1: 079f67a87ef82dffca9fc5e96b7471392f112695 SHA-256: 1f1ca1a0740e3dd731447dd0c35b2134d52463e62a72510495ed24dae7fd209c
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=intel+pentium+e5800+hackintosh+maver'. This indicates a likely phishing or SEO poisoning attempt. Additionally, the file exhibits characteristics of a link farm, with numerous embedded URLs, some of which point to 'static.usrfiles.com'. The presence of a visual download button lure further supports a malicious workflow.

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/wix?keyword=intel+pentium+e5800+hackintosh+maver
    • https://static.usrfiles.com/ugd/b8c837_daf4ec05f5bf402faf6d38e30f2777ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_644cc60047914455abfc88b6ab70a5e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d36736e2d76d4060b81fbcfa4efb4b9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2326bf082a4b47879fbc8d03a44528.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/nedetebada.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/new_odia_song_2018_dj.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/19421027736.pdf
    • https://static.usrfiles.com/ugd/b8c837_0201c2871ac146da827bac883ea7fa98.pdf
    • https://static.usrfiles.com/ugd/b8c837_121881e543384f23b0e857600fcdb254.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_off0000b1fb.bin
13e3bec23060a40faaf0b129f3c49372865bfb395b2be0a7b238afc52dd52a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FB 5692 bytes
font_01_sfnt_off0000c52e.bin
0b040fb59cdad48e7048a97ce5a470f2a7d3e7681ded7b728c2cf594d6af6fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 17016 bytes

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