PDF malware analysis — malicious · 577d415e0134b9bc

MALICIOUS

PDF

68.5 KB Created: 2020-09-02 05:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f418e04e3831720bdb1da5696495df8e SHA-1: 054d9e45246e607f2c50918328814988f1789244 SHA-256: 577d415e0134b9bca2c8b920b42bf0d404bd1799db515ecbb19864ecb1fa3f77

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=human+albumin+solution+guidelines'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content through numerous links. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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/wix?keyword=human+albumin+solution+guidelines
- https://static.usrfiles.com/ugd/b8c837_150f3557ebb9460486fd6a6afa461a1e.pdf
- https://static.usrfiles.com/ugd/934fc3_6476ea4a11d64c78b81485e66916a1e0.pdf
- https://static.usrfiles.com/ugd/be19e1_c8b1ce50bd4d4feb8a4e2540176a68f0.pdf
- https://static.usrfiles.com/ugd/0a052f_ea9b14f8061b4791bcca1a50ebb580dc.pdf
- https://cdn.shopify.com/s/files/1/0430/1615/9381/files/48222730222.pdf
- https://static.usrfiles.com/ugd/17beed_bd85ed8e9f5845fdb6f692db452f8fc0.pdf
- https://static.usrfiles.com/ugd/b8c837_2fc8fa00ffa9422d9573937e99067c4f.pdf
- https://static.usrfiles.com/ugd/dba42a_fb180d807c79485c97dc82b8695bb6c0.pdf
- https://static.usrfiles.com/ugd/b8c837_eeadb7400e864a77a736b5d441db9e81.pdf
- https://static.usrfiles.com/ugd/f103bb_59ad7e0d729649bdabb9bfc6dab8bcab.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ba72.bin` `3bd4a87aad4228fce46af46cbbd1803a2ec6157bba7d82ad68de29fd0a731cd0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA72	5148 bytes
`font_01_sfnt_off0000cbd5.bin` `2d6a34bb564e7858bd2843dc8364a8a83e08196eaea357fed7283ca1ebc55ef3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBD5	10548 bytes
`font_02_sfnt_off0000f00a.bin` `43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF00A	16148 bytes

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