PDF malware analysis — malicious · cfe964c4e18d1a2c

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 12:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: be8f721549721cae62c7bd064d9266cb SHA-1: 72acd66fd76e3f5173ffc53c7815c273387b6dff SHA-256: cfe964c4e18d1a2c4d21cc019b7860ab476ff7f6aa553ee03af3b851c51bb4be

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, directing users to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for 'blood relation problems with solutions pdf ibps guide'. The PDF also contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

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=blood+relation+problems+with+solutions+pdf+ibps+guide
- http://files.jtfas.org/uploads/1/3/0/7/130738662/170f76.pdf
- http://files.sharmellebeauty.net/uploads/1/3/0/9/130969360/tozumirazokolus_lizowa_xovuwipodonixa.pdf
- http://files.katewrighttherapy.com/uploads/1/3/1/6/131637108/dedikekanagemixej.pdf
- https://cdn.shopify.com/s/files/1/0429/6369/7820/files/11918263604.pdf
- https://cdn.shopify.com/s/files/1/0428/3400/2086/files/safotisetafajirebi.pdf
- https://cdn.shopify.com/s/files/1/0447/8858/0512/files/define_bailment.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
- https://cdn.shopify.com/s/files/1/0433/4852/5206/files/aaron_beck_cognitive_therapy_of_depression.pdf
- https://cdn.shopify.com/s/files/1/0436/0273/9363/files/debatoretubudir.pdf
- https://cdn.shopify.com/s/files/1/0437/4586/9985/files/fefumodudifi.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
- https://cdn.shopify.com/s/files/1/0429/3161/7945/files/kepuzelokerulevu.pdf
- https://cdn.shopify.com/s/files/1/0433/3669/5959/files/data_security_definition.pdf
- https://cdn.shopify.com/s/files/1/0431/5804/4826/files/ponapazum.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_off000065be.bin` `645bd593b50babb5e4b4b43e7edceb9df4b2394cf689db3fb8910bdcaf79cf68`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65BE	5616 bytes
`font_01_sfnt_off000078af.bin` `aa649e9c9171358d6c0475a7f27622d691ecb5833c3c2770809eb4dab816d7b4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78AF	10516 bytes
`font_02_sfnt_off00009c60.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C60	4324 bytes

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