PDF malware analysis — malicious · 449e2f22b2f721ce

MALICIOUS

PDF

47.8 KB Created: 2020-07-30 11:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ea2a804b323d487c77b3d18aa7359ca4 SHA-1: 681867bf66df5b7d9594edb2f028ad7a8333c22a SHA-256: 449e2f22b2f721ced06d4b58bc97a8d36ab893fdee92d007d7927cb060f2ff15

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=asynchronous+learning+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, suggests a theme of 'asynchronous learning' to disguise the malicious intent. The ML classifier strongly indicates 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.ru/pify?keyword=asynchronous+learning+pdf
- http://files.bwmusic.net/uploads/1/3/1/3/131384383/1be4a9027cbd8a.pdf
- http://files.manufixed.com/uploads/1/3/1/3/131379496/7122752.pdf
- http://files.catledgeconcepts.com/uploads/1/3/0/9/130969896/pupejom_mesiwiditi_jakugatiwi_womajanudi.pdf
- http://files.bwmusic.net/up
- https://cdn.shopify.com/s/files/1/0434/1117/7639/files/wekowa.pdf
- https://cdn.shopify.com/s/files/1/0428/6509/8908/files/25882650018.pdf
- https://cdn.shopify.com/s/files/1/0428/7735/4143/files/manonukobipuwujerulirus.pdf
- https://cdn.shopify.com/s/files/1/0438/1684/5469/files/xatujaseguvuja.pdf
- https://cdn.shopify.com/s/files/1/0431/4995/1125/files/melotodan.pdf
- https://cdn.shopify.com/s/files/1/0431/4274/2167/files/mekexanoseg.pdf
- https://cdn.shopify.com/s/files/1/0428/6880/1695/files/94186093684.pdf
- https://cdn.shopify.com/s/files/1/0433/5245/7369/files/kigalisasi.pdf
- https://cdn.shopify.com/s/files/1/0434/0131/4454/files/wuxuserorukofav.pdf
- https://cdn.shopify.com/s/files/1/0430/4027/6642/files/jowalogalomepik.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_off00007e0b.bin` `06ca13d4db7ed21e0baed73a20b74326e89ebe58103cd46ca7d1e175fb430e5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E0B	5308 bytes
`font_01_sfnt_off00009009.bin` `a080600eba267f1fdca7e3f8349e1982bb32d14eec913ae8459753ccdc6fd749`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9009	10040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.