PDF malware analysis — malicious · 043d4b8c98467cc7

MALICIOUS

PDF

39.4 KB Created: 2020-08-27 23:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b1e74ea01d609aca0b801362d82dfa5c SHA-1: 1b4290ec6c8f1e99fa96479350b598728a3acc28 SHA-256: 043d4b8c98467cc7c8f2a3f55be2e85446954a4d7ac4315eb464c6ca99512462

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=sideways+arithmetic+from+wayside+sch, which is known to host malicious content. The document's structure suggests it is part of a link farm designed to lure users 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.com/pify?keyword=sideways+arithmetic+from+wayside+sch
- http://lelenagas.marina-lutz.ch/uploads/1/3/1/0/131069839/wokoniduw.pdf
- http://files.merutech.com/uploads/1/3/1/4/131410370/da187e.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/2100/9053/files/ireland_outline_map.pdf
- https://cdn.shopify.com/s/files/1/0434/0681/9493/files/gexigusexojewawaba.pdf
- https://cdn.shopify.com/s/files/1/0431/6705/6028/files/ap_physics_linearization_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0428/1751/9772/files/92070540030.pdf
- https://cdn.shopify.com/s/files/1/0429/5163/9196/files/xatovaxujakunezirova.pdf
- https://cdn.shopify.com/s/files/1/0436/3422/9406/files/64342959424.pdf
- https://cdn.shopify.com/s/files/1/0441/1896/6424/files/anaconda_3_full_movie_free.pdf
- https://cdn.shopify.com/s/files/1/0429/6107/6387/files/samsung_refrigerator_catalogue.pdf
- https://cdn.shopify.com/s/files/1/0432/0290/4222/files/basiliscus_vittatus.pdf
- https://cdn.shopify.com/s/files/1/0431/8792/9245/files/difukidatar.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_off00005b12.bin` `afef429b4358f0e4f25e0479a445d652dab7985851bd598f768850a56b894592`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B12	5528 bytes
`font_01_sfnt_off00006dc7.bin` `d19f514c22a7b7371c2a874c724136a5900b3565ef589e6887407bf5494587d9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DC7	10316 bytes

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