PDF malware analysis — malicious · 14438dc505f2afa8

MALICIOUS

PDF

39.9 KB Created: 2020-09-05 08:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1e3e76527a0a7e5877247768aa3827cb SHA-1: 6b7e70bf95413b699effcea9d1362a3629519529 SHA-256: 14438dc505f2afa88a388a99ebda0f7b1a12acb3f0015a1b7d95fa4c7c5f0048

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector infrastructure, disguised with a keyword relevant to a 'Demon hunter guide'. The PDF also hosts a large number of external PDF links, many of which point to benign content, suggesting a link farm or SEO poisoning attempt to drive traffic to the malicious redirector. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=demon+hunter+guide+havoc
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/07e02c_09c96de6d2754fd194a6d42e1cbf66ed.pdf
- https://static.usrfiles.com/ugd/f63f29_2a7daad172f54ab48d157066e4ccd7a5.pdf
- https://static.usrfiles.com/ugd/b8c837_62a5d968ecc846639d3de5cc1a6faf2a.pdf
- https://static.usrfiles.com/ugd/ca300b_42e7915170d44808b6fa6a0f1db12d04.pdf
- https://static.usrfiles.com/ugd/828753_9b74fc977139442a889536540312db39.pdf
- https://cdn.shopify.com/s/files/1/0460/0424/0543/files/film_damour_en_streaming.pdf
- https://cdn.shopify.com/s/files/1/0430/5358/0441/files/72485959375.pdf
- https://cdn.shopify.com/s/files/1/0461/9704/7447/files/payment_request_letter_format.pdf
- https://cdn.shopify.com/s/files/1/0431/7960/6176/files/1436139724.pdf
- https://cdn.shopify.com/s/files/1/0439/4277/2891/files/duwufumuzosid.pdf
- https://static.usrfiles.com/ugd/d43733_707592a277714db7a6652cedb363a6f1.pdf
- https://static.usrfiles.com/ugd/e5412a_87ed4e2bf3e349b4931caf959a9434ab.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_off00005f40.bin` `e28de04a9d0cc8037498509e7db56ef192f74ff3e5312347a3edd5b615c7731e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F40	5204 bytes
`font_01_sfnt_off000070cf.bin` `77e1abce5713fccf2a0c1e1836688bda9e369346d35f850f43ef70f88483483b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70CF	10108 bytes

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