Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd394e72f87b23df…

MALICIOUS

PDF

33.8 KB Created: 2020-09-01 02:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c2c5d1cbc2aff1be9f1dd7f5f2277d2 SHA-1: 6d8d4c0f094fd2a8666d20485b53879a0fcc546e SHA-256: dd394e72f87b23dfddd67e1b62fb5f4a5ec2724602f9341379187d9a53b1366a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=plural+possessive+apostrophe+worksheet+year+5'. The document body, though heavily obfuscated, contains text related to an educational worksheet, suggesting a social engineering lure. The presence of a link farm further indicates an attempt to distribute malicious content.

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=plural+possessive+apostrophe+worksheet+year+5
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/84349039880.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/92027584013.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/bevizug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/36007986683.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/fonarakalubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7204/4697/files/91424357310.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_a5527fb666744a5d9d3faff6aec4cc1f.pdf
    • https://static.usrfiles.com/ugd/73c254_792dbfcee4dd4f02bb4b5f4eed22b721.pdf
    • https://static.usrfiles.com/ugd/d54300_0e3013d03bf4408896d325c1e39e8294.pdf
    • https://static.usrfiles.com/ugd/136d07_5852572d84074309bed3491f19449c8d.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/best_baking_sheet_for_bacon.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/16385514084.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/bapamemupokej.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.

FilenameKindSourceSize
font_00_sfnt_off000045f2.bin
35cdda296da1d34318712771549174dfaace059eb75ac3643ec1bff1d48ef922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45F2 5348 bytes
font_01_sfnt_off00005838.bin
20fceff7124613033a68e00af6fa23e95330bbd6b2a0993517564b260cea3929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5838 9892 bytes

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