PDF malware analysis — malicious · 882d90d6c772956e

MALICIOUS

PDF

41.4 KB Created: 2020-08-28 10:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c3b2c02663e84bb97a38e60b31989ad4 SHA-1: c7c351f1fbbfb4b8350ac5b40b84e3526275e304 SHA-256: 882d90d6c772956edbea336474c7f08227aa228f1e53672dca15864bce8e536f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=printable+funny+fortune+cookie+sayin'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and references to 'wkhtmltopdf', suggesting it was generated programmatically to host this lure. The presence of numerous other PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to game search engines for distribution.

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.cc/pify?keyword=printable+funny+fortune+cookie+sayin
- http://files.darrellneufeld.com/uploads/1/3/0/7/130776769/suvumodojidof.pdf
- http://files.mcveyoutdoors.com/uploads/1/3/2/6/132695994/5594059.pdf
- https://cdn.shopify.com/s/files/1/0432/8482/4222/files/gefigebumazefud.pdf
- https://cdn.shopify.com/s/files/1/0438/2470/9782/files/44243974901.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sotuxinonuwirumedubisaz.pdf
- https://cdn.shopify.com/s/files/1/0433/9240/1558/files/65137429608.pdf
- https://cdn.shopify.com/s/files/1/0429/7592/0282/files/98851834013.pdf
- https://cdn.shopify.com/s/files/1/0430/8179/3698/files/figebipiwixuta.pdf
- https://cdn.shopify.com/s/files/1/0462/3305/9479/files/clifton_beach_hobart_surf_report.pdf
- https://cdn.shopify.com/s/files/1/0428/6958/8124/files/rasijenifefozugej.pdf
- https://cdn.shopify.com/s/files/1/0429/5717/6986/files/47888819735.pdf
- https://cdn.shopify.com/s/files/1/0435/5925/6232/files/cummins_parts_catalog.pdf
- https://cdn.shopify.com/s/files/1/0429/1539/7788/files/xamaruniwadomisukij.pdf
- https://cdn.shopify.com/s/files/1/0432/0660/7012/files/femot.pdf
- https://cdn.shopify.com/s/files/1/0435/3359/8880/files/talulan.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_off0000663b.bin` `d1e8b8c7cb47b0cb81819a6a07879b0c3a56cbdc555ff3a6403195995b0e56f2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x663B	5180 bytes
`font_01_sfnt_off000077f1.bin` `1912f66de6d5f18aaf7b8c0296cc212890c7710f607dfdad75f37fdec8d05698`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77F1	9688 bytes

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