PDF malware analysis — malicious · 4a8cd9d99b5965cb

MALICIOUS

PDF

35.1 KB Created: 2020-09-01 11:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ed3e573ce520479abec81b5e73b10ac1 SHA-1: 7599bc3b16f3842ae983d4a10b72bc37d3bb982e SHA-256: 4a8cd9d99b5965cb4c066bc94af1e473994e8c852c564638de91547587e558de

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded URLs, one of which, https://ttraff.com/wix?keyword=2009+porsche+cayenne+repair+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a '2009 porsche cayenne repair manual', suggesting a lure to entice users to click the malicious link. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains multiple external links, characteristic of SEO spam or link farm techniques.

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=2009+porsche+cayenne+repair+manual
- https://cdn.shopify.com/s/files/1/0428/6545/9366/files/91254405212.pdf
- https://cdn.shopify.com/s/files/1/0433/5114/6649/files/41574868093.pdf
- https://cdn.shopify.com/s/files/1/0430/6888/3106/files/79555828698.pdf
- https://static.usrfiles.com/ugd/b8c837_842076b0f3044061a91b717af4f3cd86.pdf
- https://static.usrfiles.com/ugd/b8c837_2b2c970cff3e457c84bf45908c0f8b27.pdf
- https://static.usrfiles.com/ugd/739437_7a0ccf71568645cf9a07d26b7b924af9.pdf
- https://static.usrfiles.com/ugd/b8c837_e2f9d3322edc4e20980356a1bc218064.pdf
- https://cdn.shopify.com/s/files/1/0438/0363/9970/files/download_asterix_bahasa_indonesia.pdf
- https://cdn.shopify.com/s/files/1/0432/5851/1510/files/absalom_absalom_online.pdf
- https://static.usrfiles.com/ugd/37428b_7ae00afb68c641d0b5948eaab75f5650.pdf
- https://static.usrfiles.com/ugd/2ac701_d3f55096c7e0440792aa7a00c49f7cc3.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004af9.bin` `1a0942df4e43dfb0164cbab78a2259ad4c0dcaa2785f0c0c45053edf6fa89006`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AF9	5608 bytes
`font_01_sfnt_off00005de2.bin` `6153f63514f78abb8648c89b92117840b17974048ef1a43a965355904a185fb5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DE2	9896 bytes

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