PDF malware analysis — malicious · 0d7f65719127e5fe

MALICIOUS

PDF

53.9 KB Created: 2020-09-11 10:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7650155840a2cc0922e548f77d344a4b SHA-1: 9f3598a5c10a5e32c73d64d884d25a27a784f6db SHA-256: 0d7f65719127e5fe89cb147dcb24bc51bba72f7e40ec88dd2a3f743450595671

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The presence of a large PDF link farm suggests an attempt to manipulate search engine results or distribute further malicious content. While no scripts were extracted, the ML classifier and redirector link strongly indicate 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.link/pify?keyword=guadalupe+river+rainbow+trout+fishing+report
- http://zomug.atlanticmusictherapy.com/uploads/1/3/1/1/131164250/motimurolek.pdf
- http://files.altezagen.com/uploads/1/3/0/8/130874160/wuved.pdf
- http://rapamefiw.storageincarlisle.com/uploads/1/3/0/7/130776485/1567950.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/5bf82b_7e8a37c0c58e419b9583b5999fd0ccca.pdf
- https://static.usrfiles.com/ugd/55cc32_5da40dd719b64ca283a9d7e03db432ff.pdf
- https://static.usrfiles.com/ugd/54bec1_9ad43e5482ec43fdb62a7d1ad2872421.pdf
- https://static.usrfiles.com/ugd/63022f_9753a9ba432e4cf8b3b9670d7160c2d6.pdf
- https://static.usrfiles.com/ugd/5ea691_bb62358c7dc1443fb6c0343746e4738c.pdf
- https://cdn.shopify.com/s/files/1/0434/2690/6261/files/49909229942.pdf
- https://cdn.shopify.com/s/files/1/0437/3318/8762/files/metabolic_alkalosis_treatment.pdf
- https://cdn.shopify.com/s/files/1/0428/5048/4390/files/899967630.pdf
- https://cdn.shopify.com/s/files/1/0432/8249/7701/files/carpentry_tools_and_equipment.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_off00009610.bin` `6cb745185b69dc663c85714e28b1459f3d3fa94dfb4e9f769c35f0f1a260441b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9610	5628 bytes
`font_01_sfnt_off0000a945.bin` `ebe13b5319901ffb8938f60e9acf45ae60a603688793bd8dd3df48edfede5566`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA945	9748 bytes

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