PDF malware analysis — malicious · 4dd6d40b0519c19b

MALICIOUS

PDF

39.7 KB Created: 2020-08-13 22:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 05f5b7467696e41d507983e6b623d9a5 SHA-1: 6bcac3f90061a63250ffc0472754299e28532702 SHA-256: 4dd6d40b0519c19b84343240b426812bd77dbafc40cd64947a09ee054036ab1e

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=limiting+reactants+and+excess+reactants+worksheet+answers', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a phishing or redirection scheme.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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/pify?keyword=limiting+reactants+and+excess+reactants+worksheet+answers
- http://tadofan.galliltd.com/uploads/1/3/2/6/132682076/pemagixisa.pdf
- http://files.themerchantsguildstore.com/uploads/1/3/1/0/131070911/13f7d.pdf
- http://files.voyageoftherascal.com/uploads/1/3/1/4/131453188/wowaluzuribarosif.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
- https://cdn.shopify.com/s/files/1/0431/4379/0760/files/90602199280.pdf
- https://cdn.shopify.com/s/files/1/0437/7319/8497/files/79985496864.pdf
- https://cdn.shopify.com/s/files/1/0428/0333/1231/files/19084620307.pdf
- https://cdn.shopify.com/s/files/1/0433/4741/1096/files/wugej.pdf
- https://cdn.shopify.com/s/files/1/0432/8649/5388/files/advanced_mathematics_1_by_pandurangappa_c_download.pdf
- https://cdn.shopify.com/s/files/1/0440/1247/0422/files/beats_audio_apk_unrooted.pdf
- https://cdn.shopify.com/s/files/1/0431/0974/4789/files/tokoduxe.pdf
- https://cdn.shopify.com/s/files/1/0431/8691/3439/files/lededilarusugitevubozod.pdf
- https://cdn.shopify.com/s/files/1/0428/3393/6547/files/argument_fallacies.pdf
- https://cdn.shopify.com/s/files/1/0428/8249/8716/files/furizokizakori.pdf
- https://cdn.shopify.com/s/files/1/0431/3301/0082/files/84924744650.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_off00005e85.bin` `af3a61f1b94976cfdfc797a109b626b7912e2fc63ede39c597fefe7a336c4f08`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E85	5484 bytes
`font_01_sfnt_off0000710d.bin` `2320a434dee1e911c6412f631f78cab9e77be32543f12d7193f11c868fd8243e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x710D	9456 bytes

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