Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf7a0c8216b31cb…

MALICIOUS

PDF

41.4 KB Created: 2020-07-08 20:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67ae12b5a586763cb6c08323c44fd54d SHA-1: 66a63e71709480f5109124d78cd84df72c431e51 SHA-256: 0cf7a0c8216b31cbf34253c166dd803c6eaa155b125e06a4a92cc828c6842d8e
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 domains associated with link farms and redirectors, indicating a phishing or malicious redirection attempt. The primary lure appears to be 'baby shark chords pdf', directing users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lead users to malicious content.

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/wb?keyword=baby%20shark%20chords%20pdf
    • http://files.juliamandalaweaver.com/uploads/1/3/1/3/131380138/5479598.pdf
    • http://files.theesquiremovie.com/uploads/1/3/0/7/130738821/e97aa5f596.pdf
    • http://files.leilaspaws.com/uploads/1/3/2/8/132815172/8a8938c.pdf
    • http://files.stylezbyomi.shop/uploads/1/3/2/3/132303020/946843fca.pdf
    • http://files.elysianbotanica.org/uploads/1/3/1/4/131437454/6785233.pdf
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdf
    • http://files.jewellhjohnson.com/uploads/1/3/2/8/132816158/252b1d3f634b0.pdf
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dulevope.files.wordpress.com/2020/06/worizukelenexujoxa.pdf
    • https://simovojeb629202265.files.wordpress.com/2020/06/49867851145.pdf
    • https://dapiloxi.files.wordpress.com/2020/06/zitebokeresurusotawibogiw.pdf
    • https://laderafi767971175.files.wordpress.com/2020/06/6372487125.pdf
    • https://wodugodew84787651.files.wordpress.com/2020/06/99819888029.pdf
    • https://gijifibu.files.wordpress.com/2020/06/37054544364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.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_off00005936.bin
4a909051476753e415ea050ce1db4a1f2ca576c1fc5e980ce6ad4300a25e3778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5936 5000 bytes
font_01_sfnt_off00006a2f.bin
51a67da8dbc7cd96fb6feb2b7ee2faf3e0de59b13de06dbdcb963442428daf75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 14816 bytes

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