PDF malware analysis — malicious · e997fa0bca045bed

MALICIOUS

PDF

54.6 KB Created: 2020-08-30 12:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e19372d44a1d27e187905841576cf52 SHA-1: 6b1cff54af2a30bf515b8d17e5ce31864856a235 SHA-256: e997fa0bca045bed3efad5a8636899273d8ecb2161d0958afda6d5545189f5e7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a large link farm, combined with the ML classifier flagging the PDF as malicious, strongly suggests an attempt to lure users to potentially harmful websites. The document body contains the malicious URL and numerous other links, indicating a spam or phishing lure.

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=madhab+raj+ghimire+nepal
- https://static.usrfiles.com/ugd/b8c837_107871a511b54473afb38051ef128d10.pdf
- https://static.usrfiles.com/ugd/b8c837_99ea93d438a34e9a980688eeb3c53495.pdf
- https://static.usrfiles.com/ugd/cc14e4_aac0f3d077c64c6cad52d941fc32ad7f.pdf
- https://static.usrfiles.com/ugd/b8c837_94a74801f76b4755a92aa15516616763.pdf
- https://static.usrfiles.com/ugd/b8c837_11d6c5dc5fcd45b691e18ddb7d4e19c8.pdf
- https://static.usrfiles.com/ugd/b5472a_4d92df791bd84e12be529a99640e47fd.pdf
- https://static.usrfiles.com/ugd/b8c837_eef6f5f77388495b85a12336361531d8.pdf
- https://static.usrfiles.com/ugd/0c41e7_ebfd770a19a945cd9367782c761a421f.pdf
- https://static.usrfiles.com/ugd/b8c837_15861b91b164477fb0af47f3fd67a988.pdf
- https://static.usrfiles.com/ugd/b8c837_4baa7026e90046c99245cfd96e892ee4.pdf
- https://static.usrfiles.com/ugd/b8c837_12918248429a48a5a194bf0ac226cdbc.pdf
- https://static.usrfiles.com/ugd/b8c837_83c94c35d1d04a19bc32a8329cb88f04.pdf
- https://static.usrfiles.com/ugd/b8c837_facd8f0f98a144e2b13d908f4d4011ff.pdf
- https://static.usrfiles.com/ugd/760101_f4a1f9afaac7465d985643be18b6ff65.pdf
- https://static.usrfiles.com/ugd/b8c837_4c3db10aacf14b5e8cb2cfbbe9a95f8e.pdf
- https://static.usrfiles.com/ugd/b8c837_fd461d227334486cb00d8ddb7b81d9d7.pdf
- https://static.usrfiles.com/ugd/b8c837_eb7b9ff53afe4665843893c2008d0bbc.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007245.bin` `469e656e53cf933de3edfc0095cdc42b7040560adb16924578b648c5c8965f60`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7245	5016 bytes
`font_01_sfnt_off00008316.bin` `6674f5b35e4b026e0e2f65a09e71a6416a96c4c5909ffabd02222d3a908fb5da`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8316	10092 bytes
`font_02_sfnt_off0000a5a8.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA5A8	4324 bytes
`font_03_sfnt_off0000b3a9.bin` `b1d3bdbc8711afdaaee6d2a0779193c29b03043c46bd4bd8d95a22b406fe375c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3A9	6780 bytes

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