PDF malware analysis — malicious · 394e61c07e59cb55

MALICIOUS

PDF

43.6 KB Created: 2020-07-30 09:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8c76bc948b4924bae5b0603df6131094 SHA-1: d11ea8cdc4bd072129e30b8ef7bb59940e17bfc3 SHA-256: 394e61c07e59cb55cbf717a954de33947c1763b732be154087f664ec4a0c72c2

120 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that the PDF links to a known malicious redirector infrastructure via ttraff.cc. The document body appears to be heavily obfuscated or corrupted, preventing analysis of its direct content. The primary attack pattern observed is the use of a link farm to obscure malicious redirection.

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=preschool+letter+worksheets+pdf
- http://files.mutedwoo.com/uploads/1/3/1/3/131384432/divurekewo.pdf
- http://files.pellegrinotheatre.com/uploads/1/3/1/4/131407051/bijeror.pdf
- http://files.mcwichita.com/uploads/1/3/0/9/130969446/nodabero-kupuwegif-luwelizinogax-rizepikanekoli.pdf
- http://files.polelifestyle.us/uploads/1/3/1/4/131437980/2094144.pdf
- http://files.isleofnorthuist.com/uploads/1/3/1/8/131871705/2412437.pdf
- http://files.isleofnorthuist.com/uploads/1/3/1/8/131
- https://cdn.shopify.com/s/files/1/0435/9389/2008/files/vitosabajogunu.pdf
- https://cdn.shopify.com/s/files/1/0433/8286/6072/files/jebinekudeforujibuxulov.pdf
- https://cdn.shopify.com/s/files/1/0437/4996/5978/files/96094072483.pdf
- https://cdn.shopify.com/s/files/1/0435/1967/2472/files/65037973675.pdf
- https://cdn.shopify.com/s/files/1/0433/3151/8622/files/96031269652.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdf
- https://cdn.shopify.com/s/files/1/0437/4088/9240/files/dineni.pdf
- https://cdn.shopify.com/s/files/1/0432/7525/5972/files/kuxanawe.pdf
- https://cdn.shopify.com/s/files/1/0432/1837/0728/files/kupodilimifezuruxefe.pdf
- https://cdn.shopify.com/s/files/1/0437/4953/9989/files/88517415642.pdf
- https://cdn.shopify.com/s/files/1/0434/7628/7648/files/49609561387.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.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_off00006e25.bin` `ce1d14cafff3fa50d4847f92389d5935ff451f6be8c85cbb91e141f8b3b86817`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E25	4824 bytes
`font_01_sfnt_off00007eb2.bin` `e326521b6e2b59023e7af1ac99e7cdc4e9278d78c9907e305ab693dcded8d853`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EB2	10024 bytes

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