PDF malware analysis — malicious · 0301f7c79866d5b5

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 23:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4d4c3baa7df3e976fcffe90aa0230a54 SHA-1: 1b2675cecd2a27d6c39b8169812ff7313e8d23b5 SHA-256: 0301f7c79866d5b50ca29eff950f9c0829efe443bd5b7fa58085b40b1c045728

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to tax filing and the malicious URL, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness.

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=belasting+aangifte+2017+app+en
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/0ebc1f_9c6872bbfc0b46519dbc5f86202063e3.pdf
- https://static.usrfiles.com/ugd/b8c837_0e273e18c1004126acd85c1c5cee17c8.pdf
- https://static.usrfiles.com/ugd/7ea8bb_da0a183e7f71477b86a68ac3eee3a04a.pdf
- https://static.usrfiles.com/ugd/7baf93_a96dc99a01f840b39db4dc0e469d3236.pdf
- https://static.usrfiles.com/ugd/2e79a6_63af6133ec8a43afadc7bc90ffabac25.pdf
- https://static.usrfiles.com/ugd/cbe7f7_be470660167a4740ace247aba53a2009.pdf
- https://static.usrfiles.com/ugd/fb83f1_d7ea1156e0404f17975630a87ebeda85.pdf
- https://static.usrfiles.com/ugd/3eed2b_d17ad89214a14bae99e298570206868c.pdf
- https://cdn.shopify.com/s/files/1/0437/6638/2749/files/xenoblade_2_aux_cores_guide.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23582012054.pdf
- https://cdn.shopify.com/s/files/1/0435/9376/0931/files/business_development_report.pdf
- https://cdn.shopify.com/s/files/1/0437/8315/9969/files/komivoxebujer.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_off00005b31.bin` `24e335489969ed8587fab55c2b1cd7e0938cead93f5442281af029d4af9c5616`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B31	5428 bytes
`font_01_sfnt_off00006dd1.bin` `1da11977bff074c28b5c1c75f15dcbbedc3b60d6708a826480d8e5fdf403d71b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DD1	9920 bytes

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