Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bacb02f5a02260…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 00:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010c21ee138abd3bd4cf6ac8c774c8a9 SHA-1: 4eba4f53086e6eb2125beb95aa28da2b48b7d002 SHA-256: 72bacb02f5a0226090626a2ec7973a69d8b9154ae2662d2a8cee0a79edfd021c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to sheet music and a URL that appears to be a search result. This suggests a phishing or scam attempt, likely using the embedded links to direct users to malicious content. No scripts were extracted, but the PDF structure itself is indicative of a link farm designed to funnel traffic to a malicious site.

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.com/wix?keyword=canon+in+d+sheet+music+original
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/930050_cadb7e5bb6e84fb2b859e65f144c42f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_29d3032025114b37a63b1c20dcdd4ee5.pdf
    • https://static.usrfiles.com/ugd/01bc73_824eb68881b54cc8ba2a0206369a5314.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e091a9e74441d1ab7d59b58a3b6bc5.pdf
    • https://static.usrfiles.com/ugd/79cb75_181eab5282d84000aeac64a72e877096.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_a99d2afba1474d52bd5a49e9bc7741f7.pdf
    • https://static.usrfiles.com/ugd/9219f8_fa8b32dc98a14016bdd2080b0bb058ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3627c8100d844888d7e80be0a9117e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e31096bca645476da2cf9c1840b4be8f.pdf
    • https://static.usrfiles.com/ugd/a91264_562b04bb981740cf978473e6f9483093.pdf
    • https://static.usrfiles.com/ugd/8ba634_bbbc585492a34bbba69f07e663d1fd83.pdf
    • https://static.usrfiles.com/ugd/dd4472_63baf8ea967c4d8f8fa4039cabb677bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/factorio_steam_turbine.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000097d4.bin
f631ae94a663f0ba0296dff35a9e5aace2dcd0567212cece7c439cda6afdb25f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x97D4 17940 bytes
font_00_sfnt_off00006309.bin
63740cecd28c54d2de2199994d2f4f19893306c2963f146e842bd5b19eee07ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 5260 bytes
font_01_sfnt_off000074b5.bin
49dc4b7fa29b3f092914550dc92d6981dcdb11d8c3d4d88d9fb44be65d4f6b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 10180 bytes

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