PDF malware analysis — malicious · cfc49b06bc1929f9

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 14:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2d160f91bf190563f1ee1a22460c765 SHA-1: 3558aebe22d6ae44c294256525fdc8c5b3543181 SHA-256: cfc49b06bc1929f935d3351015c3a6e474c06dd1672f798b25877ffa016124a5

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/wix?keyword=sri+venkateswara+suprabhatam+in+telu. This suggests a link farm or redirection attack designed to lead users to malicious content. The ML classifier also 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.ru/wix?keyword=sri+venkateswara+suprabhatam+in+telu
- https://static.usrfiles.com/ugd/b42fd6_14e8b0d9a6af435bbeb506d841f9f3f0.pdf
- https://static.usrfiles.com/ugd/e73fea_079c357d1946427ca263f7a18680948f.pdf
- https://static.usrfiles.com/ugd/2ac701_adb93e8c3113431e95476fac163df35f.pdf
- https://static.usrfiles.com/ugd/724fb5_b5054faa50274dc2a93b0726ab059b78.pdf
- https://static.usrfiles.com/ugd/f84671_add38bceaf17436f8df7d4f879118cc0.pdf
- https://static.usrfiles.com/ugd/3e87bf_f08176b309af4cf199610a922a5b65e6.pdf
- https://static.usrfiles.com/ugd/b8c837_bab4fb75bd07401dbd7e7bf39f9660f0.pdf
- https://static.usrfiles.com/ugd/8b2c09_fc90859ed7054585be12945ff5d27d85.pdf
- https://static.usrfiles.com/ugd/b8c837_7383c48d06cb41799bd6d22c2e475cff.pdf
- https://cdn.shopify.com/s/files/1/0436/2492/3298/files/bowilizelu.pdf
- https://cdn.shopify.com/s/files/1/0445/8446/8644/files/download_ayat_1000_dinar.pdf
- https://cdn.shopify.com/s/files/1/0436/6155/7913/files/xavotigamowo.pdf
- https://cdn.shopify.com/s/files/1/0440/7679/4021/files/lexitalo.pdf
- https://cdn.shopify.com/s/files/1/0429/1415/2607/files/95197592152.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_off00004e01.bin` `00f84f426747b125fe3f9a4ba924b7fb69e30fb1834cc09d93fd6657cbf27cbf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E01	5516 bytes
`font_01_sfnt_off000060a5.bin` `da338f17cac5821e605620062121db38170a7f90de4e9e4e39f579fc7d98a098`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60A5	13632 bytes

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