Malicious PDF — malware analysis report

Static analysis result for SHA-256 9faa3984cb944943…

MALICIOUS

PDF

60.7 KB Created: 2020-08-31 05:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041cbb6d8b037c7002398d557a1a8ac4 SHA-1: 66f9d42ed8ef14596e462370cf22981edbe1db0c SHA-256: 9faa3984cb944943cbc3a6694eda7a830b98b706157916ca9de74f047b2dee89
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.cc/wix?keyword=idioms+and+phrases+with+meanings+and+examples+pdf+free+download'. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

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/wix?keyword=idioms+and+phrases+with+meanings+and+examples+pdf+free+download
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/bus_eireann_100x_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6627/files/aws_cli_cloudformation_parameters_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/90738385546.pdf
    • https://static.usrfiles.com/ugd/e2b09b_4971a1c612194d46913b730259bd587f.pdf
    • https://static.usrfiles.com/ugd/dad90e_49fdfdfbe9ad4874bbbd565082293cc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_76caa8574d1f42748c249e5a7a8c8f39.pdf
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/mudupefokusadolowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/surah_al_mulk_arab_dan_latin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/pizza_bolis_menu.pdf
    • https://static.usrfiles.com/ugd/b8c837_1eabd907aca14637ae146caed76fda28.pdf
    • https://static.usrfiles.com/ugd/eb4c03_2439056040244652bef1f635a6cbbb4d.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.

FilenameKindSourceSize
font_00_sfnt_off00007473.bin
070d2496ac05e62f7682b5bd42b3b5213f9aff88bb48b4c6135716b051762ce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 5552 bytes
font_01_sfnt_off00008743.bin
c7fe6e626902f3432bc27701c099c27840b061e3a4bcc47b739732f7440cc13a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8743 10152 bytes
font_02_sfnt_off0000aa4a.bin
4471f92216f50ed59660dfde07325d7bc7936b356a877ae20405b399f7876638		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4A 16060 bytes
font_03_sfnt_off0000bf18.bin
b6bd1cae98c89eb7117bcbc83b4ec2e1dee2e67132b441a8c65cbfdbc553b7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF18 12068 bytes

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