PDF malware analysis — malicious · 32736029a35b7e51

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 14:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 08c849931042966b21912a1f9aec7090 SHA-1: f1f048c7fbc90d476f79521bfaf1563ade464151 SHA-256: 32736029a35b7e516809e51de7ad3a30d9aa1425a63cb0ebf83d2ef3d35be9d9

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a lure related to a "crooked moon guide" and embeds multiple links. One of these links, https://ttraff.ru/wix?keyword=crooked+moon+guide, is identified as a malicious redirector. The presence of numerous links, including one to a known malicious redirector, strongly suggests a phishing or social engineering attack aimed at directing the user to harmful content. The ML classifier also flagged this PDF with high confidence.

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=crooked+moon+guide
- https://static.usrfiles.com/ugd/b8c837_67d04f1d24194b81b01a8012bb7b7ad4.pdf
- https://static.usrfiles.com/ugd/b8c837_2cdfb3aa930b43659eda54004d84a4b3.pdf
- https://static.usrfiles.com/ugd/b8c837_a8cfe8325a9a4ed59c2a6af40d7704f9.pdf
- https://static.usrfiles.com/ugd/b8c837_cf6424b2a5d14e59af56f43835f6b197.pdf
- https://static.usrfiles.com/ugd/b8c837_36865808e3de48bf84b4df5d9636c6a9.pdf
- https://cdn.shopify.com/s/files/1/0429/2257/3990/files/55668036611.pdf
- https://cdn.shopify.com/s/files/1/0439/7914/5374/files/44476284731.pdf
- https://static.usrfiles.com/ugd/b8c837_2dc9ff70fd914d5fa4a2ff22bcb19ab2.pdf
- https://static.usrfiles.com/ugd/286fb8_f1a535d35064462fb97575a6df71eebe.pdf
- https://static.usrfiles.com/ugd/b8c837_09a1505ba1864445ae4780b5e3ee6aca.pdf
- https://static.usrfiles.com/ugd/b8c837_a870ca16a0a54b08a50e02f673722e8d.pdf
- https://static.usrfiles.com/ugd/b8c837_f7cdb4bd582949d7b3e22d49208ab37a.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_off00006779.bin` `90e03f2619adc77bc26d89de3fde5f77d167d0bab20a0530fa50e09f8a1b1e23`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6779	4696 bytes
`font_01_sfnt_off0000775c.bin` `bb4cdaf42389bddc7a71166de9bf912b77cb11dd02ba4e3f908f55fef0dd0a1c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x775C	10208 bytes

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