Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9abf98491f61b8…

MALICIOUS

PDF

57.7 KB Created: 2020-09-08 10:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b63c64136ad2c1c2d7ac1c7486626a1 SHA-1: ce60f184cf822c3851091e77a1ab32f5b14212dd SHA-256: da9abf98491f61b8b4aeeb256c4305a4533352df94ace3f40b2d6ea1fab13d1f
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a link farm, indicating a likely attempt to lure users to malicious sites. The embedded URL 'https://ttraff.com/pify?keyword=birthday+wishes+song+in+tamil+movie' is a primary indicator of this malicious redirection. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the link farm tactic. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/pify?keyword=birthday+wishes+song+in+tamil+movie
    • https://static.usrfiles.com/ugd/23b571_b26acdeba06542a1b90dc188359493bb.pdf
    • https://static.usrfiles.com/ugd/808d8c_e6a33d9ab5f749f383d82c4c34e961f6.pdf
    • https://static.usrfiles.com/ugd/96768c_e9ab8855d2e348fb8c73cdabad749174.pdf
    • https://static.usrfiles.com/ugd/24853a_bb1e042791364b0487afab2aa7558b34.pdf
    • https://cdn.shopify.com/s/files/1/0463/3853/9676/files/word_letterhead_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/tafexirif.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/dezofamudig.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/52686191445.pdf
    • https://static.usrfiles.com/ugd/8d57bd_a1d5c52258f446ce8e1035a8721ffdc4.pdf
    • https://static.usrfiles.com/ugd/868f76_47119e29268d45f9a18176e4d40d84a4.pdf
    • https://static.usrfiles.com/ugd/338562_7d45bf85f7f144c5897052e8985b12cd.pdf
    • https://static.usrfiles.com/ugd/f2c1dc_4bbaead23766414aa16367d051526f0d.pdf
    • https://static.usrfiles.com/ugd/de60da_3121d86be129497cb1b65fd1e8d55a0b.pdf
    • https://static.usrfiles.com/ugd/48f461_06e3dbd8317b42899f2ab1f317b25c6d.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a628.bin
c0563d9fca31b1e0d6e1a597048a42d867477608cc0c406eab4d63e9168b5bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA628 5540 bytes
font_01_sfnt_off0000b8f5.bin
422456c83e571dcd29975b221a347341555b3214a0dc1307a56b67d9906c7c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F5 13216 bytes

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