PDF malware analysis — malicious · 4a97199ea157239c

MALICIOUS

PDF

117.7 KB Created: 2020-07-09 11:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9fc2f3897ee403026817d09af942fb9d SHA-1: 6254573c8dcbcbccfcc5fe9e217f9189948451a4 SHA-256: 4a97199ea157239c1696e72692586ec101954cbff357d03939e6b698538f6053

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to distribute malicious content. The ML classifier strongly supports the malicious nature of this document. 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.ru/pify?keyword=terminologia+medica+prefijos+sufijos+y+raices+pdf
- http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.pdf
- http://files.spinecarechiropractic.net/uploads/1/3/1/3/131384018/30437.pdf
- http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdf
- http://files.thewriterandtheriver.com/uploads/1/3/1/3/131382406/bokotilexutok_rimefokuturafez_jepudo_lotur.pdf
- http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
- http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdf
- http://files.drgrahambooks.com/uploads/1/3/0/7/130740180/mejupasomegup_narusomafi.pdf
- http://files.bansteadurc.org.uk/uploads/1/3/1/1/131163705/834221.pdf
- https://womaserimew.files.wordpress.com/2020/06/55100391910.pdf
- https://voduvixuzo.files.wordpress.com/2020/07/zuvabe.pdf
- https://volisavosak.files.wordpress.com/2020/07/vedevebofipetemudafugaz.pdf
- https://julatepos.files.wordpress.com/2020/07/xiradilinatituzowewozi.pdf
- https://pozisivovef.files.wordpress.com/2020/07/97192337435.pdf
- https://ladareguk.files.wordpress.com/2020/06/56359506727.pdf
- https://zidenulunet.files.wordpress.com/2020/06/45409211075.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.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_off00018f13.bin` `ac10418528b16a3b3efbd3592f36c3d1626c9809a9b9e58b1781e0c3c113fd9e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18F13	5404 bytes
`font_01_sfnt_off0001a15d.bin` `a30a88ec882f80a9372d4c2aaa0106112b99fb4ff01d9d50851c1f67fe947169`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A15D	11724 bytes

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