PDF malware analysis — malicious · 20d28bce2deda47f

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 01:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a298da079793ae13d93d907861fd73ef SHA-1: 126c6282a3e841f229522cb723e3dd4f9e1e353d SHA-256: 20d28bce2deda47fe1eb0a9239ac277f5d7bc4bfbb714aeff07e72af8d87304b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=jahyun+kim+haboush'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Shopify and usrfiles.com. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site through these links.

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/wix?keyword=jahyun+kim+haboush
- https://cdn.shopify.com/s/files/1/0433/4610/0374/files/zagumilenamokajig.pdf
- https://cdn.shopify.com/s/files/1/0428/4638/8380/files/43823785959.pdf
- https://cdn.shopify.com/s/files/1/0433/3050/2806/files/naluwojemilojedojari.pdf
- https://cdn.shopify.com/s/files/1/0431/0895/8362/files/80795881400.pdf
- https://static.usrfiles.com/ugd/5bb01c_98aa811d5df14cf5b8ca5082d99f50cb.pdf
- https://static.usrfiles.com/ugd/b8c837_8901d2675ded4b4db21fc507091c7d55.pdf
- https://static.usrfiles.com/ugd/b8c837_a42bb6666747494786b15eb149dae19e.pdf
- https://static.usrfiles.com/ugd/b8c837_dbef19994c02481a98afd43b7786c9c2.pdf
- https://static.usrfiles.com/ugd/b8c837_0c0f970a1c59417fbeed5f5969150827.pdf
- https://cdn.shopify.com/s/files/1/0434/7697/5768/files/free_airdroid._apk.pdf
- https://cdn.shopify.com/s/files/1/0441/3066/4600/files/oxford_english_grammar_guide.pdf
- https://cdn.shopify.com/s/files/1/0431/7318/3643/files/283201777.pdf
- https://cdn.shopify.com/s/files/1/0428/9898/1030/files/hindu_calendar_2020_panchang.pdf
- https://cdn.shopify.com/s/files/1/0439/4539/4331/files/oil_eia_report_time.pdf
- https://cdn.shopify.com/s/files/1/0431/3173/2132/files/97112638093.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000065ae.bin` `fd1f9a315b776e87325a8643fa2257b2999637a846e4e6afba58c6e3dc763fe2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65AE	4480 bytes
`font_01_sfnt_off00007573.bin` `aa21b3e2af055de3df6389602a42b6a6d0b4f2b9a4aff695a513b9928b03acb4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7573	5092 bytes
`font_02_sfnt_off0000869f.bin` `e31bee6d532eb307b745d823feedf90588492839761017a45496cce084bc5f3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x869F	10560 bytes

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