PDF malware analysis — malicious · d5a011b959c45f3d

MALICIOUS

PDF

34.3 KB Created: 2020-09-02 07:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 31b359b5adc47a2d0039c40d8b17bea7 SHA-1: 4a43b8ae2be20197ecd4f028d6c937dcf7b4ec2f SHA-256: d5a011b959c45f3d923ec80a2afd8fd408935ce3198a8dbbf2d70698d07d4bc8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily corrupted, contains text that appears to be a search query related to song titles, likely intended to disguise the malicious intent of the links. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.ru/wix?keyword=aashiq+banaya+aapne+song++2005+bestwap
- https://static.usrfiles.com/ugd/bae363_9166cbdaacf9489db3009287e740dfdd.pdf
- https://static.usrfiles.com/ugd/daca0d_a3a8babf38a74d64a2306b67c3df6248.pdf
- https://static.usrfiles.com/ugd/60933b_522cf0320fa34f069585c690e294ed29.pdf
- https://static.usrfiles.com/ugd/f967ac_6cf1932a705a4a12bf72bc6810e20452.pdf
- https://static.usrfiles.com/ugd/95089d_03ad045481fd44e58cbb2f9559ada8ad.pdf
- https://static.usrfiles.com/ugd/5ad03d_64913c45442b482596f55bf37960c6dd.pdf
- https://cdn.shopify.com/s/files/1/0440/6041/0006/files/lojiz.pdf
- https://cdn.shopify.com/s/files/1/0430/0341/2633/files/31027546933.pdf
- https://cdn.shopify.com/s/files/1/0440/7744/9366/files/25880112171.pdf
- https://static.usrfiles.com/ugd/6df952_ea8ffac3c8ff4312a2fc8ccec2a25e08.pdf
- https://static.usrfiles.com/ugd/0d2908_dc6b022a63ba41c7b5444d2de306c046.pdf
- https://static.usrfiles.com/ugd/8c0e65_68c506ccf5d54fdda472af3a06db9df5.pdf
- https://static.usrfiles.com/ugd/3615fb_d7607363c73b46898df56b5b38a0b3cb.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_off00004626.bin` `60968b8c8e813c3f5ce8cf9a2fe42b18b1a07e125270ecd10cc15bba65653d25`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4626	5800 bytes
`font_01_sfnt_off000059ff.bin` `26fd811569622c28ece9c2f48ade920bfccc21428bea2b88b0cce62c89d8a306`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x59FF	10096 bytes

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