PDF malware analysis — malicious · 330e3d191f3d92c4

MALICIOUS

PDF

47.3 KB Created: 2020-09-04 08:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d1dbf1b6562faefb23442552e26b2aae SHA-1: ffefd54e9ae797f85016c38e06c9b549ca13d992 SHA-256: 330e3d191f3d92c41ac1aa4eb4c88601e87b63a65a6a40121cdf49c7c9bcfe4f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a balance sheet model PDF. The ML classifier strongly indicates maliciousness. The embedded URL is a critical finding, pointing to a known malicious redirector infrastructure.

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=balance+sheet+model+pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipipopiluniwewikojidil.pdf
- https://cdn.shopify.com/s/files/1/0428/5769/3347/files/65852128606.pdf
- https://cdn.shopify.com/s/files/1/0434/0213/3667/files/wefemagil.pdf
- https://cdn.shopify.com/s/files/1/0429/1778/9862/files/enterobacterias_multirresistentes.pdf
- https://static.usrfiles.com/ugd/b8c837_5def78df6d9a4c24803373e69d6f63c3.pdf
- https://static.usrfiles.com/ugd/b8c837_5ecd898ac8d74c389ba3a94c5d426505.pdf
- https://static.usrfiles.com/ugd/1cc7e8_09bb1fe233fb4839af4bee1ca1cb1967.pdf
- https://static.usrfiles.com/ugd/b8c837_15da5ebc1360471ab55a8ca19d7e0308.pdf
- https://static.usrfiles.com/ugd/6260fe_ffe186e79d0643a883540edc01665fbb.pdf
- https://cdn.shopify.com/s/files/1/0449/8613/8792/files/daburoveravujedez.pdf
- https://cdn.shopify.com/s/files/1/0431/6083/0116/files/46656814964.pdf
- https://cdn.shopify.com/s/files/1/0430/3123/2674/files/govupinilinediw.pdf
- https://cdn.shopify.com/s/files/1/0437/4449/3720/files/analytical_reasoning_mcqs_with_answers_download.pdf
- https://cdn.shopify.com/s/files/1/0433/5108/1114/files/jixavebojuru.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_off00007a02.bin` `6dd6a0674878f8bda5aec9a16ecb0634552d2a64624d5f81fd217674d13015ce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A02	5348 bytes
`font_01_sfnt_off00008c0f.bin` `9617b12bf5e0026f97b0f6934933d3bb46864bf8d7ac0fab49cb7c3d506507f6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C0F	10628 bytes

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