PDF malware analysis — malicious · 72a218c0d9fc79a5

MALICIOUS

PDF

37.5 KB Created: 2020-09-01 01:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9aaadf451b07b2540e3f9ff9b81c51c0 SHA-1: 78530be9213a0b41ff60a2114ce627d35c4d2658 SHA-256: 72a218c0d9fc79a58fb03a1aaae82954887717f0b4e22a5ca133205fc142892c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting an SEO link farm or traffic generation scheme. One of the primary links directs to a known malicious redirector infrastructure, indicating a malicious intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=jonas+brothers+perform+burnin+up+2019
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/6163/1389/files/93737065868.pdf
- https://cdn.shopify.com/s/files/1/0429/6127/2988/files/bose_companion_3_series_ii.pdf
- https://cdn.shopify.com/s/files/1/0439/1983/5304/files/si_hubiera_estado_alli_acordes.pdf
- https://cdn.shopify.com/s/files/1/0435/5470/1463/files/revejalogijuwa.pdf
- https://cdn.shopify.com/s/files/1/0437/5393/0901/files/39329138214.pdf
- https://cdn.shopify.com/s/files/1/0430/7743/5556/files/fallout_76_fusion_generator.pdf
- https://static.usrfiles.com/ugd/07e02c_4f3251f95bb24cdbb44b064facfc7fd4.pdf
- https://static.usrfiles.com/ugd/76de1a_0575419f50c142a9b06484049126ccca.pdf
- https://static.usrfiles.com/ugd/166c09_b4e8d366fefd4261a607571dc8eb5638.pdf
- https://static.usrfiles.com/ugd/97634b_f06ac313680e40f7a61a3a05783d0c8f.pdf
- https://static.usrfiles.com/ugd/9757e7_ca3e11e032ce4814b50c6157c36308eb.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_off0000521d.bin` `a3d659e31be7b69035baf11f6d3882b32fae48345d1f98c5ff3c119f7a918ee6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x521D	5720 bytes
`font_01_sfnt_off00006565.bin` `196060072fa5e0ecdc13167eb726602095ce9d41ed0732887dc5dff793cedbab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6565	10520 bytes

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