PDF malware analysis — malicious · dfb5a9995466072d

MALICIOUS

PDF

35.8 KB Created: 2020-09-01 15:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d3672604deb5bbaae58ee727037b4fa7 SHA-1: af6ca9ea28751b947efc827d3e09d2fecc882a46 SHA-256: dfb5a9995466072dc3d3d5d231724c560c7483fcf0ce9079609a0e783dfd4f4b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to distribute or obscure malicious links. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, indicating a lure to external content.

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=green+screen+background+effects
- https://cdn.shopify.com/s/files/1/0434/5298/9607/files/anatomie_de_l_oeil_cours.pdf
- https://cdn.shopify.com/s/files/1/0432/1198/0964/files/bexuguxi.pdf
- https://cdn.shopify.com/s/files/1/0438/9991/2344/files/vosudodorirora.pdf
- https://static.usrfiles.com/ugd/c2bf0a_bb24b9fad87d4487834589ec287fa9f6.pdf
- https://static.usrfiles.com/ugd/b7082a_e0e2fab8c6c7446c801aacba0a6e8c1c.pdf
- https://static.usrfiles.com/ugd/b8c837_41cd3becc36648eb92556877ce68099e.pdf
- https://static.usrfiles.com/ugd/05301a_2cc04d0008e4422b9a16963bf1238f4e.pdf
- https://cdn.shopify.com/s/files/1/0428/8207/2743/files/silekumejosudiraragut.pdf
- https://cdn.shopify.com/s/files/1/0436/9534/1723/files/rabetidoge.pdf
- https://cdn.shopify.com/s/files/1/0430/0007/0307/files/bournemouth_and_poole_college_sixth_form.pdf
- https://cdn.shopify.com/s/files/1/0448/5169/1681/files/umayyad_caliphate.pdf
- https://cdn.shopify.com/s/files/1/0430/7861/5189/files/27714802029.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_off00004f18.bin` `053313177f86e3735ae1480ec34c40cccc778ad5e20c117686852671f0229798`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F18	5392 bytes
`font_01_sfnt_off00006187.bin` `e35ad9bf8f7835a6a7ff860bf5752ce3a17eca5e28455c8c06c12796319a9171`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6187	9776 bytes

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