PDF malware analysis — malicious · 0d02a8dfbc5a6d9c

MALICIOUS

PDF

46.3 KB Created: 2020-09-02 04:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3e611b47bbe94813e2c304dd8edf8fa2 SHA-1: 44ad448f6c2852c3b6ced8f98a7b0c7cab992db7 SHA-256: 0d02a8dfbc5a6d9ce2056ac9643a06299a9abd8acdf872796dec6ca5e07f9b02

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to obscure the malicious intent. The ML classifier 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.me/pify?keyword=in+search+of+the+myreque+guide
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/7176/6695/files/dipid.pdf
- https://cdn.shopify.com/s/files/1/0431/6954/6396/files/63283860773.pdf
- https://cdn.shopify.com/s/files/1/0428/3888/4519/files/bricklaying_tools_and_equipment.pdf
- https://cdn.shopify.com/s/files/1/0433/8774/8508/files/23457729145.pdf
- https://cdn.shopify.com/s/files/1/0434/7166/7360/files/11339452374.pdf
- https://cdn.shopify.com/s/files/1/0429/1349/7251/files/74682678925.pdf
- https://static.usrfiles.com/ugd/c345b0_9467fa77e6a741118e423b33e556ef37.pdf
- https://static.usrfiles.com/ugd/9a242c_d57b540d77074cfcb089c9fe9d70d50b.pdf
- https://static.usrfiles.com/ugd/b8c837_a4c5e787f2bd47cd926fb14535470c8c.pdf
- https://static.usrfiles.com/ugd/91e123_c71007f32b284bcead4674fa6d749995.pdf
- https://static.usrfiles.com/ugd/bcd086_281c107d89094250a2756082206f9ee2.pdf
- https://static.usrfiles.com/ugd/cbdbb6_b5c722bd52084678a740b12a6bf24216.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_off0000779e.bin` `39733586444253d3af1b47987818dab04efee7a2e2554ebe40df946fc84ddb30`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x779E	5568 bytes
`font_01_sfnt_off00008a61.bin` `f1790b54e1c6a35f418ec554fe5ea689254269758fe2b9fb8f607c360e66f426`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A61	10008 bytes

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