PDF malware analysis — malicious · 64da89537086dfec

MALICIOUS

PDF

43.2 KB Created: 2020-09-01 10:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d0bf3dba6a6857054b8f58984c914b75 SHA-1: 5ca6b3d7f6aa5091dbcb49bf8f437e34e5ae053c SHA-256: 64da89537086dfecda2f9c05e3d2a910009010ba07c6fbb289a0b48c892409ce

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links, many benign, suggests a link farm or SEO poisoning tactic to distribute the malicious document. 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.com/wix?keyword=jelaskan+peranan+akuntansi+sebagai+sistem+informasi
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/4dd980_7c47309ab68f4cc79f9fe5d6e5bc3e92.pdf
- https://static.usrfiles.com/ugd/270e53_2ba991e8e5104bef8e3f9c59918a1fbb.pdf
- https://static.usrfiles.com/ugd/bae363_cd425f06e66f4a9394af48ebb109a8a8.pdf
- https://cdn.shopify.com/s/files/1/0428/9767/0303/files/baperokiwifeva.pdf
- https://cdn.shopify.com/s/files/1/0434/3355/8168/files/6496446810.pdf
- https://cdn.shopify.com/s/files/1/0432/2469/4942/files/kodiwebezup.pdf
- https://cdn.shopify.com/s/files/1/0428/1715/9335/files/firoparibowo.pdf
- https://static.usrfiles.com/ugd/aec2ea_70f62f8e6a464ffcac6db03e151e5f2f.pdf
- https://static.usrfiles.com/ugd/837d34_cd458ec8cf0e4fb78679c88375f60ffc.pdf
- https://cdn.shopify.com/s/files/1/0428/1355/4855/files/lepumogaf.pdf
- https://cdn.shopify.com/s/files/1/0431/1970/6273/files/47225201320.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_off00006a51.bin` `03951e3d29d563ef6ee8617c306818803b3a9dbe235435922780042173ac3cb9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A51	5416 bytes
`font_01_sfnt_off00007cad.bin` `4b693b9d813ff28a54a6677ed2acdeb8620ef6995cb3659a6585b6c1b8b961f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CAD	10276 bytes

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