PDF malware analysis — malicious · 6b68b6b0fd790edf

MALICIOUS

PDF

33.5 KB Created: 2020-08-28 23:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 633d5ce27570f83734e5e7cdf69b07dc SHA-1: 18d3fb71db9f956be60ec1908915dc0cc68011e2 SHA-256: 6b68b6b0fd790edff956ab4041706c7a0b3baf99de79cb57d6d6d3544cacb08f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=guide+pour+communiquer+en+fran%25C3%25A7ais+2+aep'. This URL is likely used to redirect users to a malicious site. The document body, though partially corrupted, contains text that appears to be a lure related to a French communication guide, aligning with a phishing or scam attempt. 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=guide+pour+communiquer+en+fran%25C3%25A7ais+2+aep
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_81171a28561940d09ed1a8e461cc24b1.pdf
- https://static.usrfiles.com/ugd/b8c837_b224d8e76dea45cda904ec41700dd946.pdf
- https://static.usrfiles.com/ugd/b8c837_a77fcee47bbc407a82ad57eb7e063926.pdf
- https://static.usrfiles.com/ugd/b8c837_c7a857dc0c504b479524203800e8996a.pdf
- https://static.usrfiles.com/ugd/b8c837_bdc485f64a9e4057b15f325d968dca48.pdf
- https://cdn.shopify.com/s/files/1/0437/5199/7592/files/nusinam.pdf
- https://cdn.shopify.com/s/files/1/0430/6403/3429/files/83049703912.pdf
- https://static.usrfiles.com/ugd/b8c837_54b9d9deb186495c844334894d34d319.pdf
- https://static.usrfiles.com/ugd/b8c837_69eacfa2fd24478ab8177c7c07243d6e.pdf
- https://static.usrfiles.com/ugd/b8c837_b139f2e832534566ba572c359f306460.pdf
- https://static.usrfiles.com/ugd/b8c837_31eafa4a4833453b89353e055376cbda.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_off00004194.bin` `30ddb953bdf38c6ba4c3091af2068a5136ecea91323af4ab0a449c0c3700a495`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4194	5740 bytes
`font_01_sfnt_off000054bb.bin` `ece3412da7518ebe86c8f0400c7e4d8e1b97c79fd80fb735c7e6a7442d4dc7fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x54BB	10612 bytes

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