PDF malware analysis — malicious · b3e74ab625f91825

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 23:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ad4aacb7d7f5cfb7752f2e2f9a258d77 SHA-1: f9e74b9ad86dbbcd12042232b917b19b01c43cd0 SHA-256: b3e74ab625f9182575be4401d91a26159b56260ce82975d6e92788c67b838b70

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text related to "Dbm year end bonus guidelines 2019" and a URL that appears to be a lure. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt. No scripts were extracted from this sample.

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=dbm+year+end+bonus+guidelines+2019
- http://linukosi.airbrushartstudio.com/uploads/1/3/0/9/130969060/rilove-ginurexutib.pdf
- http://kapazeb.optimized-performance.com/uploads/1/3/0/7/130739204/noxuzobatubigi_lovojesazawas_nipawupa.pdf
- http://nulan.holytemplec.org/uploads/1/3/0/7/130776321/301983.pdf
- http://files.iowaearlylanguage.com/uploads/1/3/1/4/131454221/064b6cd44341.pdf
- http://files.lipsmonsherri.com/uploads/1/3/0/7/130739015/nafena.pdf
- https://cdn.shopify.com/s/files/1/0443/6285/8652/files/map_of_the_world_labeled.pdf
- https://cdn.shopify.com/s/files/1/0430/5672/6165/files/tanukupavobap.pdf
- https://cdn.shopify.com/s/files/1/0433/6753/0655/files/20601025735.pdf
- https://cdn.shopify.com/s/files/1/0435/5650/3707/files/hauger_golfklubb_baneguide.pdf
- https://cdn.shopify.com/s/files/1/0438/3745/6534/files/cash_book_questions.pdf
- https://cdn.shopify.com/s/files/1/0457/8816/8358/files/40867655946.pdf
- https://cdn.shopify.com/s/files/1/0438/2952/6690/files/92325600701.pdf
- https://cdn.shopify.com/s/files/1/0430/6921/0773/files/93011991944.pdf
- https://cdn.shopify.com/s/files/1/0433/2421/1354/files/jesikuzalupepufide.pdf
- https://cdn.shopify.com/s/files/1/0434/3444/2908/files/moradamiduta.pdf
- https://cdn.shopify.com/s/files/1/0433/6238/6074/files/37698715413.pdf
- https://cdn.shopify.com/s/files/1/0429/9803/8679/files/34253683197.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_off00005f9e.bin` `5159dbb535d01e34db68a51dd81a4bdb705382bc80708b34dd669d3cd91cfb02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F9E	5868 bytes
`font_01_sfnt_off0000737c.bin` `34c92b64cd4c24df3b758a0a30f98dea15c22f79b5bd097b40952aa2ed3e7edd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x737C	10444 bytes

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