PDF malware analysis — malicious · e176231d88973b11

MALICIOUS

PDF

36.5 KB Created: 2020-08-31 02:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 396ee06e60ef31ca8675415c0e7876c5 SHA-1: 0cb470879cf5227d3692fcf28a622c01a95702ce SHA-256: e176231d88973b119e94f18f1e8f9584baa4b21f6b27209f579d5dd5afe458ff

152 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 a link farm hosted on static.usrfiles.com. One of these links, https://ttraff.com/wix?keyword=game+of+thrones+4+sezon+t%25C3%25BCrk%25C3%25A7e+dublaj+izle+hd, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Game of Thrones' and the malicious URL, suggesting a lure to entice users to click the malicious link.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=game+of+thrones+4+sezon+t%25C3%25BCrk%25C3%25A7e+dublaj+izle+hd
- https://static.usrfiles.com/ugd/7598fa_ffe53e46dd8845a4afbbda2408faff00.pdf
- https://static.usrfiles.com/ugd/df4650_0ccbcb1db57a44d3bfaec07b42c35d3b.pdf
- https://static.usrfiles.com/ugd/4c1554_176b2d4d97f543879a103ef5370280c8.pdf
- https://static.usrfiles.com/ugd/c068f8_4d132ec257eb42dca57b7d09f64288e6.pdf
- https://static.usrfiles.com/ugd/d775a9_5fdb4bfdfab74040aed1d87680f9b0f7.pdf
- https://static.usrfiles.com/ugd/dc51bb_b12cb304cef3434384248406c49e61fd.pdf
- https://static.usrfiles.com/ugd/b8c837_fafa41c826854254940890c10bed8360.pdf
- https://static.usrfiles.com/ugd/36f25b_a69e7890cf7842138e913d046790ccf8.pdf
- https://static.usrfiles.com/ugd/4d400c_2a124f649f32438990b6f721ac657e15.pdf
- https://static.usrfiles.com/ugd/4f270c_e311a9c6652e4ed78e8c4a11d9777d69.pdf
- https://static.usrfiles.com/ugd/23e9be_a37b1187b1f1444baafcf46faf6fef30.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004b62.bin` `a8cbcdeb52d1aec6b16d0a5e7c77f1909b069efebbae9ff28515b4b1774cfc93`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B62	5896 bytes
`font_01_sfnt_off00005f29.bin` `c4173314facf685d766ec65900e58bbf93ed82c233ec644ab9484562bdb580cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F29	11468 bytes

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