PDF malware analysis — malicious · 65dfeefa6a3d066c

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 06:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ea589f6f2d3496cde2c0aa6482903a6f SHA-1: 1ca6de0aeeb436b522120e101d6a8d1417cd2714 SHA-256: 65dfeefa6a3d066ce861e12ea0314e238494f2130cd5e90d5d3ce0c12f09e035

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=boss+therm+bps242rf+setback+temperature', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL and other benign-looking PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly indicates maliciousness, supporting the use of this PDF as a malicious attachment.

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=boss+therm+bps242rf+setback+temperature
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/d9d1f5_da3d87bcf5ba45b685705dbe81ea31ae.pdf
- https://static.usrfiles.com/ugd/b8c837_73dfdb07c00641189e673e1cfdbd9d78.pdf
- https://static.usrfiles.com/ugd/fef806_575309f0c3d14d7989a465a8d3375ea6.pdf
- https://static.usrfiles.com/ugd/cbe7f7_dd1e131dc6c04f7f978a47af0dc2ba4e.pdf
- https://static.usrfiles.com/ugd/b8c837_558be57c9b444ec29405b26a0a826d00.pdf
- https://cdn.shopify.com/s/files/1/0427/7947/6134/files/present_tense_passive_exercises.pdf
- https://cdn.shopify.com/s/files/1/0428/3426/4231/files/high_school_application_essay_template.pdf
- https://cdn.shopify.com/s/files/1/0432/2587/4600/files/wuvirokavuf.pdf
- https://cdn.shopify.com/s/files/1/0433/3273/1038/files/vipute.pdf
- https://cdn.shopify.com/s/files/1/0427/5827/5238/files/xobagipenawufemasalu.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_off000052f9.bin` `146ccc3495b00b60f424e0d20ae2786f03a8020e4994c503c37944a9ec873d0d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52F9	5696 bytes
`font_01_sfnt_off0000663d.bin` `ead2ccbff59369c55380af40682cb27e13ef327337d1ba96b67c8e2195e40168`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x663D	9876 bytes

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