PDF malware analysis — malicious · 4eb664d69c999577

MALICIOUS

PDF

40.9 KB Created: 2020-09-05 23:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3751d4075bbe17e6dd4212f6750368c7 SHA-1: 22684a913de1aa5bf17770b7dde1fedabd865b86 SHA-256: 4eb664d69c999577d02f129d15d091656b748f849d179b954d02b4f776e083d2

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links, one of which, 'https://ttraff.me/wix?keyword=biosurfactants+market+pdf', is identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent, likely to direct users to harmful content or phishing sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.me/wix?keyword=biosurfactants+market+pdf
- https://static.usrfiles.com/ugd/a4e402_aa3b69b5e6eb4306a09ea2e807aa4179.pdf
- https://static.usrfiles.com/ugd/9ea9b6_8288c1c544eb48c494485af7a437d52d.pdf
- https://static.usrfiles.com/ugd/b8c837_af8efbe698fa4e498c6bdc545e84aa6e.pdf
- https://cdn.shopify.com/s/files/1/0430/6976/7831/files/12928712118.pdf
- https://cdn.shopify.com/s/files/1/0431/1551/1968/files/43796231554.pdf
- https://cdn.shopify.com/s/files/1/0433/9613/7111/files/15688628386.pdf
- https://cdn.shopify.com/s/files/1/0448/2508/4065/files/apogee_symphony_manual.pdf
- https://cdn.shopify.com/s/files/1/0435/7498/4863/files/79148259622.pdf
- https://cdn.shopify.com/s/files/1/0434/4489/5909/files/pokiretesadego.pdf
- https://cdn.shopify.com/s/files/1/0436/1030/8765/files/application_passport_canada_form.pdf
- https://cdn.shopify.com/s/files/1/0463/4237/3538/files/babipufuxatojuzifudala.pdf
- https://cdn.shopify.com/s/files/1/0433/0212/5733/files/yoga_guided_sleep_meditation.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_off00006110.bin` `9075adc79b032f458dea5868e49438a1ee97941cd4ac53969ae63d240b9bbdfa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6110	5380 bytes
`font_01_sfnt_off0000734d.bin` `75f909a75be75a5102d5650ed2b12da55dab5db7e4d03dde281014df25629c89`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x734D	10556 bytes

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