PDF malware analysis — malicious · 83ff89accdf8f4ac

MALICIOUS

PDF

48.1 KB Created: 2020-09-01 01:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02ca5d31e1b6483cf4bbe10b53c9a037 SHA-1: 3afa16329947c822dfbf0fbf30188ab613b129ba SHA-256: 83ff89accdf8f4ac68b31dba9344468e65eb034a657002a7ad75645143e4b839

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to shopify.com and static.usrfiles.com, likely for SEO manipulation or to host further malicious content. One critical heuristic firing indicates a direct link to a known malicious redirector at https://ttraff.cc/pify?keyword=wilms+tumor+in+adults+case+reports. The document body contains garbled text but includes the same malicious URL, suggesting an attempt to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=wilms+tumor+in+adults+case+reports
- https://cdn.shopify.com/s/files/1/0462/7261/0464/files/91192482500.pdf
- https://cdn.shopify.com/s/files/1/0440/3567/0166/files/75993139705.pdf
- https://cdn.shopify.com/s/files/1/0439/7904/7070/files/misuvekigolagomadoriluru.pdf
- https://cdn.shopify.com/s/files/1/0430/5007/4269/files/zopagabajuvenul.pdf
- https://cdn.shopify.com/s/files/1/0434/9558/8002/files/all_command_prompt_tricks_and_hacks.pdf
- https://cdn.shopify.com/s/files/1/0461/6306/7032/files/zamulisajegumubetosoroxo.pdf
- https://cdn.shopify.com/s/files/1/0429/2280/3366/files/business_information_systems_jobs.pdf
- https://static.usrfiles.com/ugd/345929_9538a8acc4e74df9af75c7398f3eb1ad.pdf
- https://static.usrfiles.com/ugd/2c608b_3d756ff53eb549e39f76021fb7d4e3db.pdf
- https://static.usrfiles.com/ugd/87fdc7_8d71ff128a514431b031ee23571e1032.pdf
- https://static.usrfiles.com/ugd/9ec29b_4eaeeb6e1a5a4c0ba72fd6c847726a5d.pdf
- https://static.usrfiles.com/ugd/913720_01d9b62da70642ae9a254f5fc388b5b9.pdf
- https://static.usrfiles.com/ugd/b50c55_7d0a25655dd84574852731ea6f2180ce.pdf
- https://static.usrfiles.com/ugd/b8c837_5cd6842a3f7347c39226023b7cdfbb40.pdf
- https://static.usrfiles.com/ugd/f09a9d_117d95eb481e4b7a8f9fdccfa3baac92.pdf
- https://static.usrfiles.com/ugd/225520_53614cc18e5d432a8d362187226b1bda.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_off00007e22.bin` `181f80c77a8ab0227318407e887a9756f5846d64aca5d0e7a73c9f5376642830`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E22	5232 bytes
`font_01_sfnt_off00008fdc.bin` `d1d3c34f007dfceedfc1a644f073d3b42f74cd63829dc5068cfb679895caed0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FDC	10420 bytes

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