PDF malware analysis — malicious · 439e38d40c310655

MALICIOUS

PDF

39.5 KB Created: 2020-08-27 18:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 16d1db0be1486d666ac44791750d56b8 SHA-1: c0ef72bb6c1a64f27369a19b56b8b4655be58354 SHA-256: 439e38d40c3106556e5b3d51e19ade7e40e5c30a3bde9392f5fe5f9f11070442

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=wot+hd+maps', indicating a lure to a malicious site. The presence of numerous other PDF links suggests a broad distribution attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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.com/pify?keyword=wot+hd+maps
- http://files.timwperkins.com/uploads/1/3/0/9/130969190/3571264.pdf
- http://files.economicthinkers.com/uploads/1/3/1/1/131163620/baxadawolotu.pdf
- http://kodabo.petervinthagen.com/uploads/1/3/0/7/130740178/kurubizef.pdf
- http://files.ohmog.org/uploads/1/3/1/4/131454272/edb43dc392b6c.pdf
- https://cdn.shopify.com/s/files/1/0433/0484/5465/files/jekibimag.pdf
- https://cdn.shopify.com/s/files/1/0429/1638/0831/files/vujijate.pdf
- https://cdn.shopify.com/s/files/1/0428/6326/3910/files/32787552826.pdf
- https://cdn.shopify.com/s/files/1/0436/0346/0259/files/nemilurad.pdf
- https://cdn.shopify.com/s/files/1/0428/7909/0855/files/zojawejazupimemuroroda.pdf
- https://cdn.shopify.com/s/files/1/0429/1778/9862/files/healthy_blood_pressure_protocol.pdf
- https://cdn.shopify.com/s/files/1/0437/7300/1877/files/99261008111.pdf
- https://cdn.shopify.com/s/files/1/0435/3048/5915/files/55064105845.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_off00005cbb.bin` `f45cb468c5751133a5f11a5f693bc0e52b945aeb88e5c59031f15b8e71ca3976`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CBB	5084 bytes
`font_01_sfnt_off00006def.bin` `e5d63c1f1ad8ef5ffa34ddb6f19d4a0624a32212d501e46fe73e4c6684d02476`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DEF	10592 bytes

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