PDF malware analysis — malicious · bc74bcda906c8ddc

MALICIOUS

PDF

45.5 KB Created: 2020-07-31 06:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 751b7afe8f3f225ee2d526832e7a54e3 SHA-1: 9b6961da8686a89b148ad95ceaf92b649ba6e1bb SHA-256: bc74bcda906c8ddcbfc671d57971ce57412a8de9a39d8904de0cc40bd1727299

120 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a link to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is to host these malicious links rather than convey legitimate information. The presence of numerous links, including one pointing to a known malicious redirector, strongly indicates an attempt to lure users to malicious sites.

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=imperative+sentences+exercises+pdf
- http://files.higginseyesurgeon.com/uploads/1/3/2/6/132696174/jogotebave-pefowogakokiv-najawudok.pdf
- http://files.connierhae.com/uploads/1/3/0/7/130775828/c79e9444c7.pdf
- http://files.swimrunning.com/uploads/1/3/0/8/130874469/ee507dfd1.pdf
- http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.pdf
- https://cdn.shopify.com/s/files/1/0435/1570/7551/files/lavenejufamawonijadoxop.pdf
- https://cdn.shopify.com/s/files/1/0430/1045/7753/files/99300178927.pdf
- https://cdn.shopify.com/s/files/1/0430/4168/5665/files/56257688308.pdf
- https://cdn.shopify.com/s/files/1/0431/0158/5570/files/kimivipupivafuwarupubuvu.pdf
- https://cdn.shopify.com/s/files/1/0428/7492/9319/files/xidataxemod.pdf
- https://cdn.shopify.com/s/files/1/0428/8430/0959/files/89518710012.pdf
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/32125123498.pdf
- https://cdn.shopify.com/s/files/1/0431/4054/6714/files/93467974983.pdf
- https://cdn.shopify.com/s/files/1/0432/3459/0878/files/13977638596.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
- https://cdn.shopify.com/s/files/1/0439/5070/2750/files/supexi.pdf
- https://cdn.shopify.com/s/files/1/0431/3153/5524/files/getoweraroditawij.pdf
- https://cdn.shopify.com/s/files/1/0435/5263/7091/files/59404802960.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_off000074b3.bin` `2d645d25803cb8dc4a103b329a95bdcb5c46e9adff540619dac417b534de9a2f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74B3	5012 bytes
`font_01_sfnt_off0000859f.bin` `c8c0c773409d318751deb3c9bbb1f2b9958657a470f9c625c74619478b51fa88`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x859F	10304 bytes

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