PDF malware analysis — malicious · ee9748b27649cfbe

MALICIOUS

PDF

42.0 KB Created: 2020-08-01 23:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e25cb9ee1b2e4f8b553f64195f65985 SHA-1: f2ba8841499de8d89b4a56c2590b995dc76d0bbc SHA-256: ee9748b27649cfbe660c6a1a97b6aa84847f48267685356beabd060be14d7b01

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm for distributing malicious content. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=github+discard+changes'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com and other domains, which are likely part of the same distribution network. No scripts were extracted, but the sheer volume of links points to a delivery mechanism for further malicious payloads.

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=github+discard+changes
- http://files.forgelabradors.com/uploads/1/3/2/7/132712093/buwekoxogolabirezij.pdf
- http://files.bulacanhouselot.com/uploads/1/3/0/8/130873738/zidutikesane.pdf
- http://files.sipplemonuments.com/uploads/1/3/2/6/132696174/nulimibokesi-munebit.pdf
- https://cdn.shopify.com/s/files/1/0432/2826/6654/files/korirebazuwedowatema.pdf
- https://cdn.shopify.com/s/files/1/0428/6627/8556/files/kidadomevi.pdf
- https://cdn.shopify.com/s/files/1/0434/1320/9246/files/43911412269.pdf
- https://cdn.shopify.com/s/files/1/0431/1855/9393/files/nifumorojepibaditiriwe.pdf
- https://cdn.shopify.com/s/files/1/0430/7448/6421/files/62227768483.pdf
- https://cdn.shopify.com/s/files/1/0428/8937/9993/files/60431162067.pdf
- https://cdn.shopify.com/s/files/1/0434/6262/3394/files/dubogikaderuv.pdf
- https://cdn.shopify.com/s/files/1/0429/5272/0543/files/geromodupu.pdf
- https://cdn.shopify.com/s/files/1/0432/6418/0390/files/liwut.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdf
- https://cdn.shopify.com/s/files/1/0439/2307/9323/files/19504532673.pdf
- https://cdn.shopify.com/s/files/1/0435/4444/5082/files/lukazelasivefasenabube.pdf
- https://cdn.shopify.com/s/files/1/0431/8406/2622/files/59832872927.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_off00005cde.bin` `be41af23fc5d37ebde2398124ef6b648066d75e6e1539cbb52037e8f38a9cfbf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CDE	5340 bytes
`font_01_sfnt_off00006f00.bin` `c8f1f5e1372b5af9f31cd9b5b839beff894ebda9cb6306fc1972645a21636120`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F00	13780 bytes

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