PDF malware analysis — malicious · 50c14701eec0df3c

MALICIOUS

PDF

39.5 KB Created: 2020-09-03 23:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2dc7173503b1a61fa07e77da7b5609f SHA-1: a0379b630c4997c9529257304ed1f9659ca7e277 SHA-256: 50c14701eec0df3cdab4147e4b843790098add61b6a1799800fdb23eb961bbf8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple critical heuristics as malicious, specifically for containing a link to a known malicious redirector and a large number of external PDF links. The document body, though heavily corrupted, contains the malicious URL and several benign-looking URLs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=xml+formatter+php
- https://cdn.shopify.com/s/files/1/0436/9245/8152/files/8131957590.pdf
- https://cdn.shopify.com/s/files/1/0427/9681/0396/files/61680821750.pdf
- https://cdn.shopify.com/s/files/1/0432/6857/1299/files/8579428548.pdf
- https://cdn.shopify.com/s/files/1/0439/7934/1982/files/nikibowixupuxaxop.pdf
- https://cdn.shopify.com/s/files/1/0437/1133/2503/files/resimli_arapa_trke_szlk.pdf
- https://cdn.shopify.com/s/files/1/0430/3149/4810/files/varolavutulelivarabumidir.pdf
- https://cdn.shopify.com/s/files/1/0429/2873/4375/files/xinitoduvazivalaw.pdf
- https://cdn.shopify.com/s/files/1/0430/9044/4445/files/98573899337.pdf
- https://cdn.shopify.com/s/files/1/0430/5915/1009/files/16916532653.pdf
- https://cdn.shopify.com/s/files/1/0431/6240/2967/files/wixefakenufifa.pdf
- https://cdn.shopify.com/s/files/1/0432/3331/2925/files/12232624740.pdf
- https://cdn.shopify.com/s/files/1/0432/3731/0632/files/beating_bronchiectasis.pdf
- https://cdn.shopify.com/s/files/1/0430/8038/4674/files/kugevujukusuluw.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005a58.bin` `711ca2a824332258225afbed195cb173b6d93e3030b727a07e9b26dcd6495404`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A58	4940 bytes
`font_01_sfnt_off00006af4.bin` `2e59889b87ea6715877ba6a2c5a2f30ff657403f759c9c847c39548ce411d948`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AF4	11396 bytes

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