PDF malware analysis — malicious · bf15d5fb5f0c41ae

MALICIOUS

PDF

38.2 KB Created: 2020-09-16 15:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dc0e8821b6f9e570d044506cfbbb66a0 SHA-1: 431181a928af0d7e0a0c8b7d631403867d2c4e05 SHA-256: bf15d5fb5f0c41ae95106028f5599ef5e898f763efea01289bac81fd85001aa7

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF contains a malicious redirector link disguised as a download for 'apk mundo'. The document body also contains numerous links to other PDFs hosted on Shopify and other domains, suggesting a link farm designed to distribute malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=apk+mundo+descargar
- http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdf
- http://tavefif.rugbyavecoc.org/uploads/1/3/0/7/130738568/fomivutulok.pdf
- http://sapapur.ribbonhopetears.com/uploads/1/3/1/0/131069766/7fec7e19cea47.pdf
- http://files.explorewinthropharbor.com/uploads/1/3/1/3/131383325/mapofalekigiz.pdf
- http://files.callegarihorses.com/uploads/1/3/1/4/131452867/zepavifu-xawafuponegebu.pdf
- https://cdn.shopify.com/s/files/1/0431/5512/8480/files/54747682232.pdf
- https://cdn.shopify.com/s/files/1/0435/9444/9055/files/33159284753.pdf
- https://cdn.shopify.com/s/files/1/0429/8499/7025/files/mevipewakixa.pdf
- https://9d1e97c6-a4ae-44d6-90c5-10e25233c7c9.filesusr.com/ugd/7d1dc9_00636f2887d24452b98c47fc5880675c.pdf?index=true
- https://70545432-771a-4e9f-bc2c-9ce55be819d0.filesusr.com/ugd/33ab24_05519f0568104230ba5b9ec0b47bb30a.pdf?index=true
- https://cdn.shopify.com/s/files/1/0452/4238/4545/files/adventurer_law_meaning.pdf
- https://cdn.shopify.com/s/files/1/0431/1020/3556/files/tegerunov.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_off00005837.bin` `77d02dc8d72bc48af1c6a5dfa2f4d037a5031605960d33a44688b2c36de6ee81`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5837	5412 bytes
`font_01_sfnt_off00006a8d.bin` `e6d649d73b3e1e75a737033dd1c2311f916577c4650197941160490554af9c25`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A8D	10024 bytes

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