PDF malware analysis — malicious · 0805166b2c6b233b

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 00:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02e8e664dd62b8f65e16befba42360a4 SHA-1: ace75043ba9bca89682ee2e19a97e6398cb54911 SHA-256: 0805166b2c6b233b01e86fe2a807317caf091109154875869531ee51ad8bbc5e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to "banded iron formation diagram" and includes the malicious URL. The presence of numerous external links, many pointing to Shopify, suggests an attempt to create a link farm or distribute malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=banded+iron+formation+diagram
- http://files.stjohnsallegany.org/uploads/1/3/1/6/131637056/e65e4.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/1594/6911/files/aflatoxina_b1.pdf
- https://cdn.shopify.com/s/files/1/0430/9948/8423/files/46757382600.pdf
- https://cdn.shopify.com/s/files/1/0429/9633/4753/files/nusegigaravij.pdf
- https://cdn.shopify.com/s/files/1/0428/0667/3575/files/baby_photo_video.pdf
- https://cdn.shopify.com/s/files/1/0434/2287/5797/files/78044399730.pdf
- https://cdn.shopify.com/s/files/1/0437/5547/1006/files/arrangement_of_electrons_in_atoms_quiz_answers.pdf
- https://cdn.shopify.com/s/files/1/0428/9547/4855/files/danalugudadome.pdf
- https://cdn.shopify.com/s/files/1/0435/3160/0031/files/57434721785.pdf
- https://cdn.shopify.com/s/files/1/0427/9736/7452/files/gulob.pdf
- https://cdn.shopify.com/s/files/1/0434/7048/7702/files/brushless_alternator_working_principle.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_off00006a47.bin` `d19cf8af71e57f72fa7ac036eabceba76d8b39cd738104a7e671aa165fbf9959`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A47	5068 bytes
`font_01_sfnt_off00007b6d.bin` `bd7942e91054afd2421d43f791012505dec7d02940b1bedc99db7ff68acd3a89`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B6D	10280 bytes

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