Malicious PDF — malware analysis report

Static analysis result for SHA-256 4410b4d3ac462028…

MALICIOUS

PDF

43.1 KB Created: 2020-08-18 17:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf64f4d5aeb01f5e43a46ae537af0db3 SHA-1: 1b7c4a2594016337c6f6cc2a878529261496ee6b SHA-256: 4410b4d3ac462028e64b136d9bf3dd4df2ea36dd3818d44a91e70418a81c96e8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary malicious link pointing to a redirector. The document body, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=guitar+chords+diagram', which is flagged as a malicious redirector. This indicates the document's purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=guitar+chords+diagram
    • http://files.choisnuts.com/uploads/1/3/1/3/131381640/bitopok.pdf
    • http://files.loriblaylock.com/uploads/1/3/2/6/132681617/vuxajapo-lopalekititinek-xurimidujeri-mopexal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/29872994386.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/baloch_history_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0449/9508/4456/files/rizexawube.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/kixetomuvef.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/54545688920.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/73623187315.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/maliwewidara.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/58332044383.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/snap_circuits_jr_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/44419959326.pdf
    • https://cdn.shopify.com/s/files/1/0432/0991/6576/files/autarquias_em_angola.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.

FilenameKindSourceSize
font_00_sfnt_off000061c3.bin
0a20e879c841b5d94ad23436c94932bda180b54b52ef1422314e185b54694cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C3 5352 bytes
font_01_sfnt_off000073c3.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C3 1800 bytes
font_02_sfnt_off00007c51.bin
f2e3b86049395c59691c69963f6264faad6a9e444ab17556873dbce1b93e2d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C51 10252 bytes

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