PDF malware analysis — malicious · 24387d3175d63027

MALICIOUS

PDF

46.6 KB Created: 2020-09-13 00:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aea2adeebe84d7be72537827fc415b01 SHA-1: b9a3a0be88930ba18553132c4093860ffd6d8887 SHA-256: 24387d3175d630273a726bc56d65e9d5a0309b44b90282f442c9933a2224e93a

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 'ttraff.club', which is used to deliver the 'Hotspot Shield Elite' lure. Additionally, the PDF is flagged as a link farm, containing numerous external links, many of which point to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same lure text and URL. The primary attack pattern involves social engineering through a deceptive download link.

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.club/wix?keyword=hotspot+shield+elite+apk+for+pc+free+download
- https://static.usrfiles.com/ugd/5af86b_daa580517f004769a4c19a6892e18156.pdf
- https://static.usrfiles.com/ugd/a18aa6_4e55aa1e48ca4422bf965310cb20dcfd.pdf
- https://static.usrfiles.com/ugd/cd79e3_d524041453dc4a328a2349ee2e685b45.pdf
- https://static.usrfiles.com/ugd/64e449_8d3fcc4c65964266807707d000fdbbe0.pdf
- https://static.usrfiles.com/ugd/ecd213_fc707c2230af4ebd8d796c5a57f0ffe2.pdf
- https://static.usrfiles.com/ugd/069df5_c86a470d87d64e80963e4475add12edd.pdf
- https://static.usrfiles.com/ugd/16a96a_35d87671849646949b85f7ac0827a45b.pdf
- https://static.usrfiles.com/ugd/4c3ae3_2dc6b74871fd47788b7e918fdcf8a2c6.pdf
- https://static.usrfiles.com/ugd/53cfc7_e57f1e78f48f40de8b8dd60c29d02e22.pdf
- https://static.usrfiles.com/ugd/c1c462_af45d55f19174654b9f4cdf365629496.pdf
- https://cdn.shopify.com/s/files/1/0432/3731/0632/files/13945790377.pdf
- https://cdn.shopify.com/s/files/1/0428/3626/3078/files/dumadarifutunivozoru.pdf
- https://cdn.shopify.com/s/files/1/0433/4800/0922/files/xojuwufitoxapipimosis.pdf
- https://cdn.shopify.com/s/files/1/0438/0160/8349/files/create_fillable_template_in_word_2013.pdf
- https://cdn.shopify.com/s/files/1/0436/5480/7717/files/fibonacci_sequence_recursion.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_off000060e6.bin` `a2cb8a314efd44f447c94197278b68697692f5751bddaaf2239588d67f087255`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60E6	5360 bytes
`font_01_sfnt_off0000732e.bin` `cfea5e117cc945bbc61f0b7bb9172be16f6d342274d85ad726573e69b5c4ccaa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x732E	10468 bytes
`font_02_sfnt_off00009731.bin` `bdc5540d838a637a597e4c4da5066d2765c49e2a8c666b8fe88bfcfcd443e856`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9731	16272 bytes

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