PDF malware analysis — malicious · 0492b423b60adf70

MALICIOUS

PDF

35.6 KB Created: 2020-08-31 15:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4863df75da360bd0ce13dc4fd2dc985b SHA-1: 00983f8a5164ed9d0f80256dc615177b204a11d4 SHA-256: 0492b423b60adf70bbb8d238497107df60cc6a4e354c191a2201c839455999d3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs. The primary goal appears to be redirecting users to potentially malicious content or phishing sites.

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.cc/pify?keyword=1995+buick+riviera+performance+parts
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/289c5e_91889144d6e348dd9ddcf89da18da6ca.pdf
- https://static.usrfiles.com/ugd/b8c837_714e4135be8f4c96a179b8141231f395.pdf
- https://static.usrfiles.com/ugd/1e4819_0b0b318890df452eabe866a45a5552dd.pdf
- https://static.usrfiles.com/ugd/269bb8_fba49632fd444cd4ad50987c9128fefe.pdf
- https://static.usrfiles.com/ugd/99a8f2_97097c596c2944329534a58673360c92.pdf
- https://cdn.shopify.com/s/files/1/0433/9276/2017/files/71137792622.pdf
- https://cdn.shopify.com/s/files/1/0431/1675/7153/files/20771617857.pdf
- https://cdn.shopify.com/s/files/1/0428/9586/8057/files/filovufiw.pdf
- https://cdn.shopify.com/s/files/1/0434/2313/7957/files/minecraft_mods_for_ipad.pdf
- https://static.usrfiles.com/ugd/07e02c_9b7b96f37f3b48b18c3a14db676b0915.pdf
- https://static.usrfiles.com/ugd/b8c837_f5333afdbc4d48c2979e4d8585a24a4f.pdf
- https://static.usrfiles.com/ugd/24853a_08d1094df6334157b9044d6d85bc9a05.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_off00004b72.bin` `34ca2140b614c25f55539018b6781bea399a5bdb760a7545b6a93d860971a50f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B72	5632 bytes
`font_01_sfnt_off00005e9b.bin` `d44bb0d50f8fd0ee23d36307276be924d1548a4b89c78e60f4e3509bded26671`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E9B	10376 bytes

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