PDF malware analysis — malicious · 740d79402dfe9a88

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 03:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1faf44b1f83f7d25100daec74d8393dd SHA-1: 55faecd88b70993f4bfc3c9db157b684b9abfb86 SHA-256: 740d79402dfe9a88501fb10b4489c0877b61554f356d411a7bff472ae32aea17

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that is likely intended to lure the user into clicking on it, potentially leading to further malicious content or downloads.

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=men%2527+s+physique+training+program+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/3bca44_595d354f602447d09c15f04dac0df8e1.pdf
- https://static.usrfiles.com/ugd/b8c837_e4f7ac90e6dd4d6b9195487a5d661922.pdf
- https://static.usrfiles.com/ugd/5be868_18b4a3c23185410d9ba004c2adc4854d.pdf
- https://static.usrfiles.com/ugd/78c764_439c7372f2a34ea39ad69289db5be624.pdf
- https://static.usrfiles.com/ugd/b8c837_5b6756c8665f43999b1f49f72218db5a.pdf
- https://static.usrfiles.com/ugd/b8c837_423207164244401794b466760c6e51b7.pdf
- https://static.usrfiles.com/ugd/76de1a_1b7958006bbd4ec993ddbcf03318aa02.pdf
- https://cdn.shopify.com/s/files/1/0440/8573/9670/files/nazawutuwagufi.pdf
- https://cdn.shopify.com/s/files/1/0431/5463/6966/files/skyrim_sanguine_s_debauchery_mod.pdf
- https://cdn.shopify.com/s/files/1/0428/6893/2767/files/34924780224.pdf
- https://static.usrfiles.com/ugd/0c4177_5f3ab4edd90041c6a612543716b3e8dd.pdf
- https://static.usrfiles.com/ugd/822ecd_ffb4bc6a205a4af394715ab84b37180c.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006ff5.bin` `7fa06a8026f425b7dc9848231b0ac417bfb48d1c7cb1b6605ff0ab899b36a39f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FF5	5692 bytes
`font_01_sfnt_off00008337.bin` `4364ab7c45e93c023c79926a02a1aca836326cbf55a2e37b702c94b42ad6b67f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8337	10352 bytes

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