PDF malware analysis — malicious · 199057e3c5356792

MALICIOUS

PDF

43.6 KB Created: 2020-09-04 15:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 50646875dcd7252a2f4343831a20c595 SHA-1: 207444feefe84119649808543d08eff77b683593 SHA-256: 199057e3c5356792de3893febd37c51f9b19e8dd03cd8ea4d6f46b5ea68a2cf4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to 'Guild Wars 2 thief deadeye guide' which, upon inspection, contains a link to a known malicious redirector. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the embedded link is a primary indicator of malicious intent.

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.club/wix?keyword=guild+wars+2+thief+deadeye+guide
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_cad9da7fa409402b9399a38ecaa6359b.pdf
- https://static.usrfiles.com/ugd/a2d007_951223ec36d84b18b530849cdf48bb5b.pdf
- https://static.usrfiles.com/ugd/432b07_d04fe9c07ba343bfae05e726af4717b7.pdf
- https://static.usrfiles.com/ugd/90c678_7fb3fd855c834fb5ad3dbab2d243987e.pdf
- https://static.usrfiles.com/ugd/fa6f14_a88fed0da2d54d8fa88c5db62e1dc214.pdf
- https://cdn.shopify.com/s/files/1/0435/7170/8065/files/apnealink_plus.pdf
- https://cdn.shopify.com/s/files/1/0431/4644/4960/files/conny_andersson_reporter.pdf
- https://static.usrfiles.com/ugd/b50c55_5e9aaf1042cb4486beb4b49648504e4a.pdf
- https://static.usrfiles.com/ugd/217d68_0c701aa2f4bb46cf94fb564a48628ab8.pdf
- https://static.usrfiles.com/ugd/2e16aa_000bb195df1f437ba85e9e35c37fa7f2.pdf
- https://static.usrfiles.com/ugd/764aaa_185e2fe2aaac418dbf28d84e93afac7e.pdf
- https://static.usrfiles.com/ugd/7198c1_c97e5fe1820e42f6a30aa7194be49b79.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_off00006b10.bin` `ef8e4c331a296574314b373da11a88a7c7ab46208fb51e9e82e690e95da181e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B10	5524 bytes
`font_01_sfnt_off00007df5.bin` `cc3089541ff607e83046ca7e3b9599754d3ff8986e669c0af68ee8b48c4199dc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DF5	10420 bytes

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