PDF malware analysis — malicious · cb70b1a025ae27a0

MALICIOUS

PDF

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

MD5: a79f45df8b34ab4c5f07902a5b5b2e68 SHA-1: 18eb004ea0c59fd9160ac1dbb7dc7b0330ecabd1 SHA-256: cb70b1a025ae27a04fcd616f9f4645022ef3d01f0cdfbcadc1f91bf382430344

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=abordagens+de+ensino+mizukami+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the malicious redirector is a clear indicator of malicious intent.

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.cc/pify?keyword=abordagens+de+ensino+mizukami+pdf
- http://files.huntermarshallconsulting.com/uploads/1/3/2/6/132682681/d5a69c7eed0.pdf
- http://files.theekklesiacenter.com/uploads/1/3/0/7/130775282/5d54107.pdf
- http://files.parkingguidance.com.au/uploads/1/3/1/4/131453682/laxanuwimesawok.pdf
- http://files.easyairrentals.com/uploads/1/3/2/7/132740623/lawid_sasigeledo.pdf
- https://cdn.shopify.com/s/files/1/0433/8316/0995/files/risedotasasolo.pdf
- https://cdn.shopify.com/s/files/1/0432/4445/4056/files/60052364391.pdf
- https://cdn.shopify.com/s/files/1/0437/2480/0154/files/focus_t25_schedule.pdf
- https://cdn.shopify.com/s/files/1/0439/2468/4968/files/66756234064.pdf
- https://cdn.shopify.com/s/files/1/0432/2384/2978/files/xivexepidirevon.pdf
- https://cdn.shopify.com/s/files/1/0432/4130/8319/files/diselufuwiwalerid.pdf
- https://cdn.shopify.com/s/files/1/0432/0926/1217/files/biredorifamubelib.pdf
- https://cdn.shopify.com/s/files/1/0431/8042/5370/files/xibizijutimik.pdf
- https://cdn.shopify.com/s/files/1/0434/0151/1064/files/39787627654.pdf
- https://cdn.shopify.com/s/files/1/0437/7480/4126/files/89152211266.pdf
- https://cdn.shopify.com/s/files/1/0435/4116/8283/files/tupovire.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.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_off0001983e.bin` `02b67eee909ad08d7ffc4469499a3f5f3c66f0cfd34bf6c7edb62816cb47b55b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1983E	5572 bytes
`font_01_sfnt_off0001ab23.bin` `d3796348d0769b46c663c8d27cd36b73e01ca8682e1d9000b58939c5ca84b4a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AB23	14264 bytes

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