PDF malware analysis — malicious · 7b708cac83d15695

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 20:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c8e43a3905740192abbc4aafa4a21c02 SHA-1: e8b52d148d3fd64fddf0de81eef3be51c243a3eb SHA-256: 7b708cac83d1569515b8363c36397f9ad99c9082df5ec1b735fa7de9fa172ac5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links designed to redirect users to malicious infrastructure, masquerading as a job offer rejection letter. The primary malicious URL identified is ttraff.com, which is flagged as a known redirector. The document also contains a large number of other PDF links, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of malicious links indicates a phishing or redirection attempt.

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=letter+format+for+not+accepting+job+offer
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_714e4135be8f4c96a179b8141231f395.pdf
- https://static.usrfiles.com/ugd/4c1554_be5ed3bd278f49739d0d9d185e6b61e4.pdf
- https://static.usrfiles.com/ugd/b8c837_2f25f0a0436f4cb79993c6131a8fcc11.pdf
- https://static.usrfiles.com/ugd/b5472a_53ee97c7af404682a5b47e3981b38612.pdf
- https://static.usrfiles.com/ugd/3aee12_eb9a8c2b72714941953b65e3990b8a80.pdf
- https://static.usrfiles.com/ugd/80bfa9_eda854fbbc724b43b7e1770053123faf.pdf
- https://cdn.shopify.com/s/files/1/0440/6666/8694/files/sawidiverosit.pdf
- https://cdn.shopify.com/s/files/1/0432/2335/1458/files/how_to_install_an_apk_on_bluestacks.pdf
- https://cdn.shopify.com/s/files/1/0431/9897/2066/files/1837419355.pdf
- https://cdn.shopify.com/s/files/1/0437/2892/8920/files/sogod.pdf
- https://cdn.shopify.com/s/files/1/0434/5528/3366/files/black_and_decker_air_fryer_hf110sbd.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_off00005def.bin` `19a588ab992573479dca7d4c9af42c73ae118474cfb64aa47d46996f3818fa8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DEF	5280 bytes
`font_01_sfnt_off00006fd6.bin` `6a5c5f090c5f5aa5bcd9bde80def1877626225bc9584280ca9af399667e56a0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FD6	9696 bytes

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