Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea5392cd37904e4…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 16:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b34054852da8b7565e425413e2d797fb SHA-1: fbb0f9467c07a5515cadf5f02475a4c53b900ccc SHA-256: 7ea5392cd37904e4e0530dc2397823a7718fd1ce946d992038e9fea0df182150
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be the same as the primary malicious redirector. This suggests the PDF is designed to act as a link farm, likely to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bodyguard+film+songs++pagalworld
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6240f8_d4c23ba352f143b09972b31c71809fb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_62c9f0fc0e924daeae82770a05b6176a.pdf
    • https://static.usrfiles.com/ugd/599026_0f625009ea7949ddab02b10767c2cbef.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8a150c37262438780fc918b9154f90a.pdf
    • https://static.usrfiles.com/ugd/895bef_19f07df005314f3598bfe0af5be79f6e.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_ddfe12da0aaa404f9513649db8a9ded3.pdf
    • https://static.usrfiles.com/ugd/8ab72e_2931362b290e430fa140049b8499b6dd.pdf
    • https://static.usrfiles.com/ugd/20d83a_e7ed12ec225d4eab9fe8c77c94a5a526.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf
    • https://static.usrfiles.com/ugd/575363_1f8dc758dab44725b445ec1d53a9f68c.pdf
    • https://static.usrfiles.com/ugd/ba3095_d87298cae42c438cb43875edc2f49feb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83e55ae049b44ef9bea7ddb6f6da725.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/ruvosoneposuwiloremu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4258/6269/files/47363351017.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/bpt_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/49306356169.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/samsung_s7_software_update_android_9.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054a8.bin
cee6df0d594aba5418f648ed8e3726dcb61309eafb952f5912bcb3fd4861ca36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A8 5604 bytes
font_01_sfnt_off000067c7.bin
3395d6227db8fa6f6b20c4d6f37519f58be78e9fde881a1d236d3f17cb10cd97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 10824 bytes

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