PDF malware analysis — malicious · 088f831006818358

MALICIOUS

PDF

32.9 KB Created: 2020-08-30 02:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 66c29b3ea1a84c7f9716bc4a34104114 SHA-1: a3712869557cd616370a93259884a64cc861bf82 SHA-256: 088f831006818358f187b60b0baeac65404bd768d3beb5c9ae349e3c739ea7e2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which, 'https://ttraff.com/wix?keyword=record+dml24x+wood+lathe', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to a 'wood lathe'. The presence of numerous other links to Shopify PDFs suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicates 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.com/wix?keyword=record+dml24x+wood+lathe
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/2014/0191/files/field_guide_to_the_irish_music_session.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
- https://cdn.shopify.com/s/files/1/0429/2270/5055/files/antivirus_free_full_version_smadav.pdf
- https://static.usrfiles.com/ugd/b8c837_eb946090db084202ac0bb0505b1865fd.pdf
- https://static.usrfiles.com/ugd/b8c837_b1a9073dad9a4ebf951a0e7f5813dafd.pdf
- https://static.usrfiles.com/ugd/9219f8_968d18381e5e41ac82a2940d3895a4da.pdf
- https://static.usrfiles.com/ugd/0c8cc8_4d6ef5fab2894039be220be70f5bb3bb.pdf
- https://static.usrfiles.com/ugd/c345b0_b09fa162de6e4f4da95f6fb5a3a54f6f.pdf
- https://static.usrfiles.com/ugd/b8c837_3003a8fbfa364b62989e451aa61fb442.pdf
- https://static.usrfiles.com/ugd/66c878_991da102b3ed4579bf8d5daec057a2f2.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_off00004308.bin` `dcabc8f9815b9fb659ddce04177ce085cf567a3392546cc0d436f2e2e33b8cbd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4308	5388 bytes
`font_01_sfnt_off00005547.bin` `729d208d6f15bc51a28b487fd90b8c7fbb42faa62f26a85ce646bc5618d578c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5547	9900 bytes

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