PDF malware analysis — malicious · 9c953b1d0507002e

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 10:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1bd179009f6f217de9d4c9a53af85df9 SHA-1: d322de894c05f586b11362f0007989ee3ac936b7 SHA-256: 9c953b1d0507002eb983dd3b8b9338a0821ffd7a43a6932926cb8fcdf90d0695

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=understanding+your+health+12th+edition+pdf'. The document body, though heavily obfuscated, appears to contain text related to a health textbook, likely a lure. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful 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.ru/wix?keyword=understanding+your+health+12th+edition+pdf
- https://cdn.shopify.com/s/files/1/0434/1995/9463/files/23648168535.pdf
- https://cdn.shopify.com/s/files/1/0433/0258/4480/files/rokelul.pdf
- https://cdn.shopify.com/s/files/1/0431/4903/3640/files/augustinisme_politique.pdf
- https://static.usrfiles.com/ugd/6846fe_bd7148b54028407cbcb2bee7353e9e80.pdf
- https://static.usrfiles.com/ugd/b8c837_c046e6c9db3f4ae79f7e44e1e978235e.pdf
- https://static.usrfiles.com/ugd/b8c837_45d168df0d544de6a846328f3b998d86.pdf
- https://static.usrfiles.com/ugd/6c032c_248c621e174a42939cfe822f53b262cf.pdf
- https://static.usrfiles.com/ugd/b8c837_1b4014c6baa24e85b730d37e90d6527e.pdf
- https://static.usrfiles.com/ugd/5cf23b_00db05dd944648208ed31caf99a9a721.pdf
- https://cdn.shopify.com/s/files/1/0429/1582/3772/files/40362635383.pdf
- https://cdn.shopify.com/s/files/1/0432/8184/2341/files/95074365555.pdf
- https://cdn.shopify.com/s/files/1/0440/6027/8936/files/icd_10_cm_guidelines_2018.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_off00005be0.bin` `0ef66820dea363b30e1b8255dc53a53ecd80172cf4d23d029c53f2d2cca54bae`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BE0	5580 bytes
`font_01_sfnt_off00006ee1.bin` `d442b14a35b717e3adb90ccd62710e7b30ee51163b62539c6be2b88ac1b065c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EE1	10380 bytes

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