PDF malware analysis — malicious · bcb6c4a8ec49ec8f

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 05:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a1b9caa6a3aa89de21ed99ea9afd374e SHA-1: 68aae0e7988fc9a2986a30d834ecb4db44c5ab95 SHA-256: bcb6c4a8ec49ec8f69fa9bbef06253450ddf82dc2ac1393d65053eaa3d6c30d0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as educational content. The primary link, https://ttraff.com/pify?keyword=cbse+class+10+sample+paper+2020+20+with+solution+pdf, is designed to lead users to a harmful destination. The document also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files, likely for SEO manipulation or to obscure the malicious redirector. 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.com/pify?keyword=cbse+class+10+sample+paper+2020+20+with+solution+pdf
- http://files.evergreenchristianhs.org/uploads/1/3/0/7/130738714/6821257.pdf
- http://vojim.starrystarryskies.com/uploads/1/3/0/9/130969762/xeruwobuludapi.pdf
- http://files.wisefoolshakespeare.com/uploads/1/3/1/4/131438448/xatexeguv_nukefoxuw.pdf
- https://cdn.shopify.com/s/files/1/0429/2529/3724/files/14888772769.pdf
- https://cdn.shopify.com/s/files/1/0448/2806/5949/files/bacteriologia_clinica_libros.pdf
- https://cdn.shopify.com/s/files/1/0432/6513/0660/files/vozakaropezujediwu.pdf
- https://cdn.shopify.com/s/files/1/0436/3714/5753/files/senijaji.pdf
- https://cdn.shopify.com/s/files/1/0430/4217/7181/files/bupufoxilawikemun.pdf
- https://cdn.shopify.com/s/files/1/0436/5703/5929/files/lexixabogefenugurapudu.pdf
- https://cdn.shopify.com/s/files/1/0437/0753/1414/files/tefaroropuvube.pdf
- https://cdn.shopify.com/s/files/1/0437/7188/7767/files/10403107110.pdf
- https://cdn.shopify.com/s/files/1/0427/6020/8540/files/vorelemek.pdf
- https://cdn.shopify.com/s/files/1/0429/1638/0831/files/juroxuketikawo.pdf
- https://cdn.shopify.com/s/files/1/0432/3239/5426/files/81075763780.pdf
- https://cdn.shopify.com/s/files/1/0430/5233/5255/files/jatexijizasatetabokegi.pdf
- https://cdn.shopify.com/s/files/1/0439/0024/0024/files/gukijagapasegozuzodevizi.pdf
- https://cdn.shopify.com/s/files/1/0431/8740/4968/files/janogojivitimir.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_off0000674d.bin` `b0cdc2ce4b5c43e45f88cb874c23b9e6d398539a45bffae55ca67d73ca4c25d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x674D	5860 bytes
`font_01_sfnt_off00007b1e.bin` `d16b4432b70deed68a9ac96c4d9da64de8a50a9247de75df4ed695fab517e04d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B1E	10136 bytes

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