Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0036a34e2aa6705…

MALICIOUS

PDF

34.4 KB Created: 2020-09-02 11:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a99b2345ee94d9a1967926287be012 SHA-1: 772d6196e1be7658ae59a53a20d5c89e035f5317 SHA-256: f0036a34e2aa67051aa5c11a1da893139674fd87b2f60e3a55433b85551dab0c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though partially corrupted, contains the same URL and references a 'song chord finder apk', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.com/wix?keyword=song+chord+finder+apk
    • https://static.usrfiles.com/ugd/bfbc46_3b0312a8600b4e69b60528148dddc97a.pdf
    • https://static.usrfiles.com/ugd/7dd30d_164b6ce672dd4f4fa9f7244e4050eab6.pdf
    • https://static.usrfiles.com/ugd/de3d83_8b4f610f2c0441deb4e47b9eae67949a.pdf
    • https://static.usrfiles.com/ugd/45fd81_d1f865377bfe4d8d97dea25b9137819c.pdf
    • https://static.usrfiles.com/ugd/ce5d00_b91a2603c9a145f6b4c8bc376515c064.pdf
    • https://static.usrfiles.com/ugd/1decf9_75f631924de240dda1ea6bbc76cdcf7e.pdf
    • https://static.usrfiles.com/ugd/3de8a6_fca63007c7304978a06c77925c06decb.pdf
    • https://static.usrfiles.com/ugd/30ea26_0431895b38074e678d30d899c751ec29.pdf
    • https://static.usrfiles.com/ugd/16a96a_204f9f71f5af486da3d527814f29b40e.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/44710635797.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/gepel.pdf
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/3845253344.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/top_social_media_platforms_in_brazil.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae03b30485084813961b24a2ed935480.pdf
    • https://static.usrfiles.com/ugd/23e9be_2946fd209aa9449bb5e184d1626865be.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_off0000483b.bin
04326fe30d36dab2ba291d4a679b1c2af6349283239c9d66dde6c80bb88ea4b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x483B 5372 bytes
font_01_sfnt_off00005a83.bin
a4f9bba8adb200f65b7b76553e65a223dac634e5ed4fa3088fc0db726e6cf8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A83 10196 bytes

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