PDF malware analysis — malicious · 5c30e05d035b32ab

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 03:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 521e033a8098a151dc9674c9c021f9cb SHA-1: 18e492e5db47f033ccf378a5c9d2edf85948cf24 SHA-256: 5c30e05d035b32aba8d74799e000a71bd997c715ddf0c37cc3b2b3ada0e358e3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body text, though heavily obfuscated, contains the phrase 'Bershka indirim ne zaman' (When is the Bershka sale?), suggesting a lure related to retail discounts. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points to a link farm used for SEO poisoning or traffic generation to malicious 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/wix?keyword=bershka+indirim+ne+zaman
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_317bc0550ebd4c2b950a42dea582c972.pdf
- https://static.usrfiles.com/ugd/fe83c3_40244e66c4814352a3abc318b520d38e.pdf
- https://static.usrfiles.com/ugd/895bef_9ebf42e3418a47588aab1d2c7f6b4b15.pdf
- https://static.usrfiles.com/ugd/b8c837_40d1519768de4423a4f0c07f2cd1766f.pdf
- https://cdn.shopify.com/s/files/1/0436/0303/4276/files/mugijetavigizelanelekim.pdf
- https://static.usrfiles.com/ugd/b8c837_7de014100b8241b9abae2cccd0627259.pdf
- https://static.usrfiles.com/ugd/38bf1f_37ab406d741e4f2fa449ca81c9db8947.pdf
- https://static.usrfiles.com/ugd/b8c837_5dac4b4bd9f741ab8b2ab39a188db7e5.pdf
- https://static.usrfiles.com/ugd/b8c837_765281d8729b4e3083c224be80ecbd8c.pdf
- https://static.usrfiles.com/ugd/8b2c09_32df9b53b3ad435c84469f49d439e7a2.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_off00005d96.bin` `8ce171bd377ed3dfd5fb915ffd0ab3c142d226dad03ae17f79d3a5d1f5a0c4bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D96	5196 bytes
`font_01_sfnt_off00006f1c.bin` `97efec8e6c5e1c52aae25b8956427d709014d4c58e59edad22c6330d86d53fc2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F1C	12336 bytes

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