PDF malware analysis — malicious · e99246b9da7c68cb

MALICIOUS

PDF

40.7 KB Created: 2020-09-11 20:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1a4649ec28e0b4ea14b885ad18e65126 SHA-1: 5ca1df83f15ef29250d94ada0ceb3a0d77546f87 SHA-256: e99246b9da7c68cba560c5903220d58ba72207541ee24635c0935f37f044b2fa

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The document body, though heavily obfuscated, contains text suggesting a 'Sql server security auditing report' and includes URLs that are likely part of a phishing or malware distribution campaign. The ML classifier strongly supports the malicious verdict.

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.club/wix?keyword=sql+server+security+auditing+report
- http://lexiteb.america1funding.com/uploads/1/3/2/6/132696194/d1d22d5.pdf
- http://sofedegub.shannondellmodelrailroad.org/uploads/1/3/1/4/131406710/8ab46dbe0f4.pdf
- http://files.miniphysio.co/uploads/1/3/2/8/132814073/lewoxefel_nunufaviwiloro.pdf
- https://cdn.shopify.com/s/files/1/0432/4537/1549/files/functional_finishes_for_textiles.pdf
- https://cdn.shopify.com/s/files/1/0463/4132/4962/files/phy_android_17_farmable_sa.pdf
- https://cdn.shopify.com/s/files/1/0430/6547/5226/files/71361166870.pdf
- https://cdn.shopify.com/s/files/1/0432/6152/6166/files/38009035844.pdf
- https://static.usrfiles.com/ugd/6cf0f5_c2fe039e63a7450bbf2fb5c4d974cafe.pdf
- https://static.usrfiles.com/ugd/89c6ad_8fb507fbb7874a35a060ddcb42d65db4.pdf
- https://static.usrfiles.com/ugd/87ad98_801f9a62ffe3425ba149c7e987b29867.pdf
- https://static.usrfiles.com/ugd/717a42_97b90bcc8d804ebba8dd752da42bc888.pdf
- https://cdn.shopify.com/s/files/1/0433/3069/9414/files/64638348431.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.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_off00005fb6.bin` `de4de497ede46facccba97e6c8aa407297dce6dfc56fe842166fd7f86708967d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB6	5632 bytes
`font_01_sfnt_off000072fe.bin` `27e54a6c49013e075b57b021b847e0e94f0458bfde07d68e319daec3ec692db0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72FE	10356 bytes

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