PDF malware analysis — malicious · 32a97450ac10e9ae

MALICIOUS

PDF

59.0 KB Created: 2020-08-14 22:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9c98af1529cea33c1f22a5ea8a5d6d72 SHA-1: 3ca745ef78eef3810721ce9ebbbaafe5c0a00468 SHA-256: 32a97450ac10e9ae34cf8a3f047fc12a231d19c2b9bfaeadc81f1b0a522b9980

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to a chemistry book, suggesting a lure. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm strategy. The ML classifier also flagged this PDF with high confidence.

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=state+board+11th+chemistry+book+pdf
- http://files.komisar.com/uploads/1/3/0/7/130739621/8046234.pdf
- http://files.traumatwelve.com/uploads/1/3/1/4/131438397/1399987.pdf
- https://cdn.shopify.com/s/files/1/0440/6237/6088/files/mobotabisotuluti.pdf
- https://cdn.shopify.com/s/files/1/0429/9636/7511/files/casio_protrek_prg_270_manual.pdf
- https://cdn.shopify.com/s/files/1/0427/7154/6279/files/46630816009.pdf
- https://cdn.shopify.com/s/files/1/0429/0409/2828/files/7560374307.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupuxisupevijerabufogete.pdf
- https://cdn.shopify.com/s/files/1/0431/6577/8080/files/16056514038.pdf
- https://cdn.shopify.com/s/files/1/0435/9349/8787/files/letter_of_guardianship.pdf
- https://cdn.shopify.com/s/files/1/0433/6127/1959/files/30963310048.pdf
- https://cdn.shopify.com/s/files/1/0428/3393/6547/files/nodexu.pdf
- https://cdn.shopify.com/s/files/1/0427/6686/0455/files/zsh_command_not_found_gulp.pdf
- https://cdn.shopify.com/s/files/1/0434/1586/3447/files/98922495823.pdf
- https://cdn.shopify.com/s/files/1/0433/3033/8966/files/physical_chemistry_a_molecular_approach.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007559.bin` `3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7559	6440 bytes
`font_01_sfnt_off0000854d.bin` `58daf1abe5a6baa3c8a974f73426ae7a323afb09069893c32f7a31cbdd657d4a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x854D	5824 bytes
`font_02_sfnt_off000098fd.bin` `c6c8ff925eb15421d9abfdcd352b0aa082fb810a7cb6cba4b2896117b6828ca3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98FD	10296 bytes
`font_03_sfnt_off0000bc4f.bin` `383349637e9a5b7743423a88d059fbbdabd5f1d1dd1547196ad694b08b6306e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC4F	10596 bytes

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