PDF malware analysis — malicious · d35b5109f29d42f4

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 00:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a3b08c7d7f9e0472444cd32a3caaf69a SHA-1: 582227e9af7a8242f680265818b8c979dbaf32e2 SHA-256: d35b5109f29d42f4acac250846c5da5ef70d366c52fda0df7065d2cd9b666f85

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, presented as a 'biological classification pdf download', redirects through a malicious domain (ttraff.ru). This suggests a phishing or redirection attack aimed at delivering further malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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=biological+classification+pdf+download
- http://files.djvicny.com/uploads/1/3/1/6/131637631/4820189.pdf
- http://files.paisanoperformance.com/uploads/1/3/0/7/130776206/falum_wopirezenetoled_wuzewidalasiruj_vadizutogule.pdf
- http://poxijetiz.gillianlakethompson.com/uploads/1/3/1/0/131069934/petutoni.pdf
- https://cdn.shopify.com/s/files/1/0430/0151/2095/files/burrito_boyz_menu.pdf
- https://cdn.shopify.com/s/files/1/0434/8372/5990/files/bootstrap_3_carousel.pdf
- https://cdn.shopify.com/s/files/1/0432/6385/2708/files/zidegosagakidakopemobo.pdf
- https://cdn.shopify.com/s/files/1/0445/4989/8399/files/59912768319.pdf
- https://cdn.shopify.com/s/files/1/0429/7529/7689/files/72391580212.pdf
- https://cdn.shopify.com/s/files/1/0430/8549/6482/files/jozuso.pdf
- https://cdn.shopify.com/s/files/1/0433/3164/9689/files/47572467201.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdf
- https://cdn.shopify.com/s/files/1/0431/8865/0142/files/51053507415.pdf
- https://cdn.shopify.com/s/files/1/0430/6105/1546/files/eager_beaver_chainsaw.pdf
- https://cdn.shopify.com/s/files/1/0436/9930/6648/files/60770151501.pdf
- https://cdn.shopify.com/s/files/1/0433/4016/9366/files/tijulafejapakikeziw.pdf
- https://cdn.shopify.com/s/files/1/0427/7148/0742/files/fema_is_700_answers.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_off00006075.bin` `e639842672e9851b6d71c9c39d9c2b8df70059ecde734419827491e7e554abd6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6075	5368 bytes
`font_01_sfnt_off000072ea.bin` `414e779cd0ad78f94403a2ebc6bcc4a5387de28d397e260401b0399b18c510b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72EA	10272 bytes

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