PDF malware analysis — malicious · 1f06840210c936ca

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 04:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b4731d45577f8b55a8d9b984c6ff92d6 SHA-1: 4c39b2f1b7035e5f0113671420005cf6ff5f2cbf SHA-256: 1f06840210c936ca8862aa16af884951184395988d8ec056c8ca1f958f3a3de7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a TOEFL preparation resource. This indicates a phishing or scam attempt. 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 supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector is the malicious URL.

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.com/pify?keyword=developing+skills+for+the+toefl+ibt+intermediate+reading+pdf
- http://files.transworldgeneralcommerce.com/uploads/1/3/2/6/132681670/1901638.pdf
- http://files.rojasirvin.com/uploads/1/3/1/3/131382274/dulax_xojabezoz.pdf
- http://files.clearwaterninja.com/uploads/1/3/1/3/131384101/1674275.pdf
- https://cdn.shopify.com/s/files/1/0438/4597/6224/files/39915101799.pdf
- https://cdn.shopify.com/s/files/1/0437/5327/5546/files/60181273296.pdf
- https://cdn.shopify.com/s/files/1/0435/4359/3109/files/wrap_text_in_google_sheets.pdf
- https://cdn.shopify.com/s/files/1/0432/0555/8436/files/3019344443.pdf
- https://cdn.shopify.com/s/files/1/0434/2792/2076/files/pirinimasomuwepo.pdf
- https://cdn.shopify.com/s/files/1/0435/6590/8123/files/38079932803.pdf
- https://cdn.shopify.com/s/files/1/0434/0328/0551/files/gabokironavixulap.pdf
- https://cdn.shopify.com/s/files/1/0438/3031/3122/files/57606082952.pdf
- https://cdn.shopify.com/s/files/1/0428/6801/5260/files/zutadusubefeja.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004741.bin` `0b6f90ea18b011297973eff2edb0f35ff31764f1b6a56ddbb2f7733d04d8c2f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4741	3412 bytes
`font_01_sfnt_off00005395.bin` `255ee9858b355b4a2b16801bf47fb0a32ec470053a1c5eb0827eae0a4de23847`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5395	5716 bytes
`font_02_sfnt_off000066ed.bin` `a888534f33340dab94ae3ee555fb65466229f060653cb5d1445698cdc7212f2d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66ED	10064 bytes
`font_03_sfnt_off00008956.bin` `3a1ddf892eff323eb9eb6a994ac34371d7774fa8b5fb1d066281ee679c2753b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8956	16308 bytes

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