PDF malware analysis — malicious · a5f033457cf3cbb8

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 08:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 96c685323a03dec4b84460ebedbe4cf6 SHA-1: 49f514175f143a39a3bdbf0a4e33a4350ff290e6 SHA-256: a5f033457cf3cbb845b2492a8b269754b3763b330562c497b60cd21976746e24

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=formato+de+entrega+de+equipo+de+comp'. Additionally, it features a PDF link farm with numerous embedded URLs, many hosted on Shopify. The document body, though partially garbled, contains text related to equipment delivery forms and the URLs themselves, suggesting a social engineering lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=formato+de+entrega+de+equipo+de+comp
- https://cdn.shopify.com/s/files/1/0434/1910/7480/files/daweriwuvesiruvikani.pdf
- https://cdn.shopify.com/s/files/1/0437/1664/0923/files/28911296566.pdf
- https://cdn.shopify.com/s/files/1/0433/6238/6074/files/doxenozunufuze.pdf
- https://cdn.shopify.com/s/files/1/0436/4809/0270/files/94841339627.pdf
- https://cdn.shopify.com/s/files/1/0454/3755/0742/files/vcenter_6._5_iso.pdf
- https://cdn.shopify.com/s/files/1/0431/8789/6482/files/10398798059.pdf
- https://cdn.shopify.com/s/files/1/0461/1620/8804/files/buzazod.pdf
- https://static.usrfiles.com/ugd/b8c837_76caa8574d1f42748c249e5a7a8c8f39.pdf
- https://static.usrfiles.com/ugd/b8c837_7a632ee9836d48e6bec1a7a2dcf40888.pdf
- https://static.usrfiles.com/ugd/61b8bf_990b9401897a453f97e9b2e006f4d4ff.pdf
- https://static.usrfiles.com/ugd/ab059d_069d0c33eeed476a8775da4ac356130a.pdf
- https://cdn.shopify.com/s/files/1/0432/5530/0249/files/sijadoxotuboboke.pdf
- https://cdn.shopify.com/s/files/1/0435/0171/5622/files/storey_building_plans.pdf
- https://cdn.shopify.com/s/files/1/0430/5331/8306/files/22345260020.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004d88.bin` `e002fa3da74927d7c631dd58d9905e506a62b2f3cb213407e24882fe2c7483b4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D88	5144 bytes
`font_01_sfnt_off00005ee4.bin` `dd20645e69962c5da8aa0a16ecc2859e32275d3d750fc92b04a22af331e2ef35`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EE4	11184 bytes
`font_02_sfnt_off00008344.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8344	4324 bytes

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