PDF malware analysis — malicious · 17d58735a24394fa

MALICIOUS

PDF

43.3 KB Created: 2020-11-03 13:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6bd16af06d56b3971ff047cbbf2117ff SHA-1: e9720b68d013044b5f4dcce1f2ba0c77b14072a1 SHA-256: 17d58735a24394faa5395c467fb0cf6291670bfbae2fd9748422e7c66eba985c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector link pointing to malicious infrastructure. The document body, though partially corrupted, contains a URL that aligns with the malicious redirector finding. The presence of a large number of external links suggests a link farm or phishing attempt, likely leveraging a spearphishing attachment vector.

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://cctraff.ru/aws?keyword=progotv+smarters+app
- https://cdn-cms.f-static.net/uploads/4401696/normal_5f956a343a3b8.pdf
- https://cdn-cms.f-static.net/uploads/4369797/normal_5f8871cd266bd.pdf
- https://dasitonaz.weebly.com/uploads/1/3/4/3/134379343/pajotebe.pdf
- https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/xafitevizedit_tisuzosas.pdf
- https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/zenozexakezuv.pdf
- https://cdn-cms.f-static.net/uploads/4428033/normal_5f9a3b3b58a5f.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/zuxime/bf_vs_gf_why_they_broke_up.pdf
- https://s3.amazonaws.com/fadedosi/13803729800.pdf
- https://uploads.strikinglycdn.com/files/9de6ff57-42cf-4976-a4e2-a580e2439cce/84508444415.pdf
- https://s3.amazonaws.com/tudawufed/vawesetovosadu.pdf
- https://s3.amazonaws.com/wenobagupexekap/chuyn_file_sang_jpg_bng_foxit_reader.pdf
- https://s3.amazonaws.com/nakevoja/xogazagukijozo.pdf
- https://uploads.strikinglycdn.com/files/a37326aa-0250-4a4d-b585-21356cd21e7e/28014028553.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_off00006abf.bin` `27b60937d112cfd1a11cfe2c3fbff80e0cf54261bf1d70bed57d8ebaf6043f71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ABF	5168 bytes
`font_01_sfnt_off00007c43.bin` `a9b1b1be58219d48d5c44fd7655a2f04f09799a4ff4f22cc5fd5639153820466`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C43	10644 bytes

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