PDF malware analysis — malicious · 6a4e74c5ac6f6769

MALICIOUS

PDF

42.3 KB Created: 2020-08-04 05:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3def9b14bd23ee5eff83bb82a91f8b9c SHA-1: 03a88988125fd375a9a37aec38e3ffb76adf03ec SHA-256: 6a4e74c5ac6f67697dbb9ecc6e9a4124aa9ac8f71ba7c73b2a2466061ce59de8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and a primary redirector URL. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=analytical+and+logical+reasoning+questions+and+answers+pdf
- http://files.lifelineracing.org/uploads/1/3/1/3/131383949/47f23000.pdf
- http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdf
- http://files.hanovergardenclub.com/uploads/1/3/0/8/130814393/6d7fd7917.pdf
- http://files.belgradeoflight.com/uploads/1/3/0/8/130874295/maguwemodevenax-roxadovajokaz-vejijojat-ropak.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/0505/8976/files/83013811698.pdf
- https://cdn.shopify.com/s/files/1/0440/8908/2006/files/7276944976.pdf
- https://cdn.shopify.com/s/files/1/0430/6835/8807/files/40036022481.pdf
- https://cdn.shopify.com/s/files/1/0434/1760/0165/files/51918096118.pdf
- https://cdn.shopify.com/s/files/1/0434/4204/5090/files/68770083540.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
- https://cdn.shopify.com/s/files/1/0430/4112/8601/files/jazexozapofedinobuxa.pdf
- https://cdn.shopify.com/s/files/1/0448/5015/1584/files/franchi_al_48.pdf
- https://cdn.shopify.com/s/files/1/0436/9947/0490/files/momub.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_off000065ca.bin` `247aae006404d970fb762b44485c3b860fe7f508df891ae44968ade323c5f0e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65CA	5632 bytes
`font_01_sfnt_off00007920.bin` `c499d1cc34462a28c89034fa062c6af4ba1f42166714df9182f6516637e40bc3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7920	10216 bytes

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