PDF malware analysis — malicious · c5c9a2e5317a861e

MALICIOUS

PDF

38.3 KB Created: 2020-08-04 13:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f008eeab1f77b815aa7a89bdb7f0c226 SHA-1: e22fabcb411453db34b984de61bdc9e41066a71d SHA-256: c5c9a2e5317a861e0464064c0eb193c2112395dafed53eaecc9d4eba2450e911

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URL.

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=aprender+acordeon+de+botones+pdf
- http://files.smcountynewcomers.org/uploads/1/3/2/8/132814593/dixaxifafejal.pdf
- http://files.ifobookmarks.org/uploads/1/3/0/8/130813876/xoxovipigimilelipujo.pdf
- http://files.boulderpartytours.com/uploads/1/3/0/8/130815026/54b3998769.pdf
- http://files.monumentvalleytribaltours.com/uploads/1/3/0/7/130775334/wegino.pdf
- https://cdn.shopify.com/s/files/1/0433/5036/0232/files/20261010902.pdf
- https://cdn.shopify.com/s/files/1/0430/0832/7829/files/rutumebademonudil.pdf
- https://cdn.shopify.com/s/files/1/0428/5261/4311/files/71103207679.pdf
- https://cdn.shopify.com/s/files/1/0436/4691/0624/files/lubufukobadubujovaw.pdf
- https://cdn.shopify.com/s/files/1/0428/6549/2127/files/didupejebevigupifem.pdf
- https://cdn.shopify.com/s/files/1/0439/0027/2792/files/pebepejuritixaz.pdf
- https://cdn.shopify.com/s/files/1/0429/5265/5002/files/nixinomukutejedog.pdf
- https://cdn.shopify.com/s/files/1/0433/6674/4214/files/gazufavamirexe.pdf
- https://cdn.shopify.com/s/files/1/0434/3670/3900/files/colorado_common_grant.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_off0000531d.bin` `c65f091e6ca1a025852b3c90a31b458cc0ea952edbe1126a5d21e8993e0ebb73`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x531D	5248 bytes
`font_01_sfnt_off000064fd.bin` `8ab19a7955bdfcb52bba013aee5a8cecd29ad8c75c0d18dd54a6773499eb0ad7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64FD	11808 bytes

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