PDF malware analysis — malicious · 95111e2c99889319

MALICIOUS

PDF

49.3 KB Created: 2020-08-09 22:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ddd891001f18deaaacab02eb890af95f SHA-1: 6ed45423057f0b820c721283d1999a46a61c053c SHA-256: 95111e2c998893196318c7f502bf924f703a68a4869c63e320cee74db43c7d9e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also hosts a large number of links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=lateral+medullary+syndrome+pdf
- http://files.hannahrich.net/uploads/1/3/2/3/132302718/tejeromesofo.pdf
- http://files.spiritandsageshop.com/uploads/1/3/2/6/132682113/5322322.pdf
- http://memuwared.greenlabelhome.com/uploads/1/3/0/8/130814328/84e585fe92.pdf
- http://vejolen.nativetwiststudio.com/uploads/1/3/0/8/130874493/lubevibedojase_jawonudowi_felitib.pdf
- https://cdn.shopify.com/s/files/1/0431/4526/5318/files/juzupoxajepeninegujetitu.pdf
- https://cdn.shopify.com/s/files/1/0431/2960/2205/files/66310214882.pdf
- https://cdn.shopify.com/s/files/1/0429/9217/3217/files/wetovatudumaxa.pdf
- https://cdn.shopify.com/s/files/1/0432/2007/4657/files/mozegamofevakolobufolo.pdf
- https://cdn.shopify.com/s/files/1/0427/4218/6150/files/88008194634.pdf
- https://cdn.shopify.com/s/files/1/0431/8612/7009/files/31990504031.pdf
- https://cdn.shopify.com/s/files/1/0437/7883/4583/files/70420582155.pdf
- https://cdn.shopify.com/s/files/1/0428/4727/3116/files/3303576138.pdf
- https://cdn.shopify.com/s/files/1/0429/8476/7641/files/wakalurefenokubato.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_off00008237.bin` `23ec976ae29b313cf70011dc281ed6a324a3fa45fca8775cf10f65eeb1be90df`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8237	5228 bytes
`font_01_sfnt_off000093f6.bin` `b5afb8bc80ffd83aba28cfada6ae67beb898a50084a4b909a3dffdb98b00854d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93F6	10816 bytes

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