PDF malware analysis — malicious · cbec92a9fd9989f4

MALICIOUS

PDF

40.7 KB Created: 2020-08-14 10:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 90b9d32dab9701d5e91df33898642969 SHA-1: 47bee47be7a928d2f3ac871802cc5ae52126e7e4 SHA-256: cbec92a9fd9989f4f5a1f8ba197e6094e5accd02dc5c08a24d1affcb357cdc2f

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a critical heuristic firing indicating it contains a link to known malicious redirector infrastructure. Additionally, another critical heuristic detected a large number of embedded external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malware. The primary malicious URL identified is https://ttraff.ru/pify?keyword=halloween+worksheets+4th+grade+pdf, which is likely used to redirect users to a harmful destination.

Heuristics 3

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.
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=halloween+worksheets+4th+grade+pdf
- http://files.markrehbein.com/uploads/1/3/0/7/130739831/zogid_melavevupanubuz_notabadejebet_riwulifedalufox.pdf
- http://fisanuf.karisteinsvik.com/uploads/1/3/0/7/130776855/3c69b.pdf
- http://wavoga.verisoftgroup.com/uploads/1/3/1/6/131606727/dakiroguwupurot.pdf
- https://cdn.shopify.com/s/files/1/0430/4296/3613/files/nasugikado.pdf
- https://cdn.shopify.com/s/files/1/0431/2432/6564/files/o_autismo_livros.pdf
- https://cdn.shopify.com/s/files/1/0438/1379/8050/files/bosepak.pdf
- https://cdn.shopify.com/s/files/1/0429/6353/3977/files/neumonia_atipica_tratamiento.pdf
- https://cdn.shopify.com/s/files/1/0427/3196/2535/files/dns_keeps_dropping.pdf
- https://cdn.shopify.com/s/files/1/0430/0298/6659/files/biduvifevod.pdf
- https://cdn.shopify.com/s/files/1/0428/1332/5471/files/85893469425.pdf
- https://cdn.shopify.com/s/files/1/0431/6463/1195/files/xozutizumas.pdf
- https://cdn.shopify.com/s/files/1/0429/7680/5018/files/14211343355.pdf
- https://cdn.shopify.com/s/files/1/0430/2045/1997/files/dureviropibufapi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
- https://cdn.shopify.com/s/files/1/0428/9318/1095/files/bawesimaba.pdf
- https://cdn.shopify.com/s/files/1/0428/0667/3575/files/16383298799.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_off00005f24.bin` `ea3773d78a464668641925c0a42990fabe414775a13bd97b5a4b64a11e456789`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F24	5508 bytes
`font_01_sfnt_off000071f7.bin` `cc81dd7b3a4b4b933e197944948b04c6336a7ede2b60567318e6d0171ada8304`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71F7	10504 bytes

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