PDF malware analysis — malicious · d21e9b1a9d0f22d2

MALICIOUS

PDF

52.5 KB Created: 2020-07-27 23:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bf39de1ff76694cd3cb9d2af656e60c3 SHA-1: a6e564c8741a3459bbd87eb7ef71487693b2d0ef SHA-256: d21e9b1a9d0f22d27a244c303f243c2ca02f8693e799f4e5c9feb20ca0b537e1

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external websites, indicating a link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous external links and a malicious redirector strongly suggests an attempt to lead the user to harmful 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.ru/pify?keyword=lirik+lagu+bts+answer+love+myself+hangul
- http://files.liftislandfashion.com/uploads/1/3/1/0/131070178/novifof-panefixeloje.pdf
- http://files.revivalhub.eu/uploads/1/3/1/8/131856186/gafaxilete-lalaj.pdf
- http://files.balancedbirthservices.com/uploads/1/3/1/1/131164372/ratutos_gijiwoledipanij.pdf
- http://files.stmarychurches.org/uploads/1/3/0/7/130739924/65d5b6f8e711.pdf
- http://files.stokemodelclub.co.uk/uploads/1/3/2/8/132814071/kasixazu-nimuj-lilamo-xuzolazi.pdf
- http://files.balancedbirthservices.com/uploads/1/3/1/1/131164372/ratutos_gijiwoledipanij.p
- https://cdn.shopify.com/s/files/1/0427/6856/4380/files/41741054683.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
- https://cdn.shopify.com/s/files/1/0433/9964/3286/files/95654975704.pdf
- https://cdn.shopify.com/s/files/1/0430/6268/9946/files/70694420213.pdf
- https://cdn.shopify.com/s/files/1/0429/2814/4543/files/jigebizexuwe.pdf
- https://cdn.shopify.com/s/files/1/0428/6034/7551/files/dudawovu.pdf
- https://cdn.shopify.com/s/files/1/0431/6823/5682/files/xanizaj.pdf
- https://cdn.shopify.com/s/files/1/0429/9502/4033/files/zotusagamuwarowu.pdf
- https://cdn.shopify.com/s/files/1/0433/2378/5370/files/50252623385.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_off00007720.bin` `480ee727d767b5d0250762c6d7d90ddf0eae7abe8e17c6c3b11316df825e8f5b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7720	3076 bytes
`font_01_sfnt_off0000821d.bin` `dbe8f25860e5edbb2d9214db6e2625a10f7d5457112972d2f65b924692e0570d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x821D	5464 bytes
`font_02_sfnt_off000094a1.bin` `e712ac8e4fb01c9e2a0e9b89f38f5c60c792af716c2d29fe3bf1a7dad4737eaf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94A1	14716 bytes

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