PDF malware analysis — malicious · 46a0ae1f90f25b4f

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 16:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 96c710b3a16e4ecc23a6a58b6e4fbe60 SHA-1: 8a60a9ca0c2c09feda64a5e9dd51e32618e9fe09 SHA-256: 46a0ae1f90f25b4f9c8b9cfef833109e2986f5e14228452e2f52337a6ce175b9

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that leads to a redirector, which is a common technique for phishing and malware delivery. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a phishing or redirection attack.

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=printable+phone+address+book+template
- http://files.lichunsu.com/uploads/1/3/0/7/130775076/zakufovum.pdf
- http://vetol.conflictchange.com/uploads/1/3/0/7/130739344/rebafajazo_masinivijewu_zenan.pdf
- http://files.goodfinds1.com/uploads/1/3/0/8/130874244/nipik.pdf
- http://files.titanwrestlinginstitute.com/uploads/1/3/1/4/131437418/direrad.pdf
- http://files.the-therapy-centre.com/uploads/1/3/1/6/131606011/buzutuliwo.pdf
- https://cdn.shopify.com/s/files/1/0435/2222/8379/files/12774976564.pdf
- https://cdn.shopify.com/s/files/1/0430/4044/0471/files/15021888336.pdf
- https://cdn.shopify.com/s/files/1/0431/6938/2557/files/wasovuvuparom.pdf
- https://cdn.shopify.com/s/files/1/0445/8138/8452/files/bodybuilding_transformation_plan.pdf
- https://cdn.shopify.com/s/files/1/0433/6844/8152/files/78647185830.pdf
- https://cdn.shopify.com/s/files/1/0427/7954/1671/files/10711729991.pdf
- https://cdn.shopify.com/s/files/1/0431/8802/7543/files/fawujomaxebaneb.pdf
- https://cdn.shopify.com/s/files/1/0437/4098/7543/files/kopifevoxepuxovux.pdf
- https://cdn.shopify.com/s/files/1/0434/8366/0441/files/xewut.pdf
- https://cdn.shopify.com/s/files/1/0430/8844/5604/files/57570281626.pdf
- https://cdn.shopify.com/s/files/1/0428/7712/4764/files/3587454241.pdf
- https://cdn.shopify.com/s/files/1/0440/6778/2808/files/la_biblia_de_estudio_dios_habla_hoy_con_deuterocanonicos.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_off00005e2f.bin` `17ee0f93dd834f9c1b3ac6275e39aa3db3bdfce1c7bf4315928100f62cb73b36`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E2F	5404 bytes
`font_01_sfnt_off0000704f.bin` `630e6d2f4008efd4e748cdb4aebc0614d90ecc03d0738a7b8a44cfa322ee7f3a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x704F	10172 bytes

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