PDF malware analysis — malicious · 4dbab98419b6da58

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 02:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b8b8b21a8f2e8490fe405c8290335857 SHA-1: 3e35c8a96681b7f9d84eada6beb7373afa25b9e4 SHA-256: 4dbab98419b6da58e59ff8af2749bc909779686d0dad6600b1b80d65f7b0ca55

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=reglage+carburateur+pdf`. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure related to carburetor adjustment, likely intended to lead the user to malicious content.

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=reglage+carburateur+pdf
- http://files.altenergytrump.com/uploads/1/3/1/6/131606362/zidefetewodoza-sajiwiwosu-wupanekegeme-wibegoj.pdf
- http://files.lacombenajac.com/uploads/1/3/0/9/130969879/najixax-kasabebew-gexuguzufax.pdf
- http://files.aedt4200thesiscourse.com/uploads/1/3/1/3/131398334/6080643.pdf
- http://bidez.tylerleighnicholson.com/uploads/1/3/0/9/130969472/7030063.pdf
- https://cdn.shopify.com/s/files/1/0434/4391/2856/files/36018542125.pdf
- https://cdn.shopify.com/s/files/1/0437/6710/3645/files/70268429068.pdf
- https://cdn.shopify.com/s/files/1/0429/8558/6849/files/wiraguguvusewazumo.pdf
- https://cdn.shopify.com/s/files/1/0430/3863/8241/files/batowemafotuxuxan.pdf
- https://cdn.shopify.com/s/files/1/0438/5308/6885/files/23334531627.pdf
- https://cdn.shopify.com/s/files/1/0427/9389/4044/files/23187800898.pdf
- https://cdn.shopify.com/s/files/1/0428/2525/3023/files/kesepaxawidakarujujuni.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
- https://cdn.shopify.com/s/files/1/0428/3629/5836/files/98447017896.pdf
- https://cdn.shopify.com/s/files/1/0430/5109/0077/files/78049452236.pdf
- https://cdn.shopify.com/s/files/1/0427/9474/6023/files/xitafozuxilidezox.pdf
- https://cdn.shopify.com/s/files/1/0432/2240/1192/files/36986509109.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_off00005bb3.bin` `f5bfb46712b8a07ec6d633d495f677bc5a40a13831c3925d9a584afe83aa858c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BB3	5292 bytes
`font_01_sfnt_off00006dc8.bin` `c58566a4b71eae9b820b432f4d1bf22813094955af21f40fcc01a2d6447864b8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DC8	9660 bytes

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