PDF malware analysis — malicious · c7d8ab741ce44a05

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 03:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c355c257f1bb3d2e644e006cb30130b2 SHA-1: bc5c3914081e4744f46ae7a9ad981bc2d20cb37b SHA-256: c7d8ab741ce44a0594c09e3ac27e4e7257799c1e02aea5d86881a4e60f08f3ee

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious due to a high number of embedded external links, indicative of a link farm or redirector strategy. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/wix?keyword=brighton+rock+pdf`. The document body contains garbled text but also includes the same URLs, suggesting the primary function is to host these links. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=brighton+rock+pdf
- https://static.usrfiles.com/ugd/f09a9d_8c7fcf4478b343cf8109a94616747ad6.pdf
- https://static.usrfiles.com/ugd/26938b_a8b5a6f00a0740ae819071d7aedaec61.pdf
- https://static.usrfiles.com/ugd/c7a620_f0bdf46f011f43b4a4b47415e64a478f.pdf
- https://static.usrfiles.com/ugd/5fd5c1_e91d17a74a8a43ebb96e07e7d800e263.pdf
- https://static.usrfiles.com/ugd/19ce5d_191f4ed9433e4dddad4723e42f98ff95.pdf
- https://cdn.shopify.com/s/files/1/0435/6207/4261/files/kejotijinodirez.pdf
- https://cdn.shopify.com/s/files/1/0429/6137/1290/files/wiruxatavun.pdf
- https://cdn.shopify.com/s/files/1/0461/8990/4021/files/powuzidasidetaxot.pdf
- https://static.usrfiles.com/ugd/3eed2b_a49244f051934358996033b72acd0682.pdf
- https://static.usrfiles.com/ugd/74a852_67311b5dd6624635a8a72777dbf5bec3.pdf
- https://static.usrfiles.com/ugd/f1780b_6de206a94f09424b985754bac8c1bd2c.pdf
- https://static.usrfiles.com/ugd/db1da1_71d712e18445468ca32179f4f96a0657.pdf
- https://static.usrfiles.com/ugd/b8c837_c5dee5a90e39463bb8b468e71cefd19f.pdf
- https://cdn.shopify.com/s/files/1/0430/4276/7001/files/fupoxuluzulexoxuwinaxuger.pdf
- https://cdn.shopify.com/s/files/1/0437/7319/8497/files/free_printable_kindergarten_addition_worksheets_with_pictures.pdf
- https://cdn.shopify.com/s/files/1/0427/8065/5775/files/musowagegun.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_off00006027.bin` `3c2ca42256d601ac9642ba6361fa8e325b1fd9d17587eae44edd9e58a0d628e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6027	5112 bytes
`font_01_sfnt_off00007190.bin` `70360caf4b60b6123c1fc93c7bf19d384a8840bf0ac25cdb7b3c183eaee0b2ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7190	10448 bytes

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