Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c07602bba085939…

MALICIOUS

PDF

54.0 KB Created: 2020-06-09 05:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca8648bdcda36a5567d21162dd89bcdc SHA-1: 49267c1f3c2881c9792a2bfb36f6ba872288da73 SHA-256: 0c07602bba0859396c6f5d103821687a9bcaa3338240029e50c3e06142d8798f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, masquerading as a study guide. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to lure users to a malicious site. The presence of many PDF links also indicates a potential link farm for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wp3?keyword=hobet+study+guide+book#hobet+study+guide+book
    • http://acawv.preview.pethealthnetworkpro.com/uploads/1/3/1/4/131453588/5413074.pdf
    • http://scrub-hub.com/uploads/1/3/1/6/131607467/5760234.pdf
    • http://capturingtheride.com/uploads/1/3/0/5/130540106/5088588.pdf
    • http://estigmatattoo.com/uploads/1/3/0/6/130605041/gewuti-lewaku.pdf
    • http://teresalam.com/uploads/1/3/0/6/130640042/6105750.pdf
    • http://equusourique.com/uploads/1/3/0/6/130621387/bojevosorolipa.pdf
    • http://74-123-76-207.mgwnet.com/uploads/1/3/0/7/130776728/7801884a3581d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zabexom.files.wordpress.com/2020/06/zufidevaf.pdf
    • https://tijudemupox.files.wordpress.com/2020/06/92459273979.pdf
    • https://zebutenot.files.wordpress.com/2020/06/bixetilut.pdf
    • https://mopiwum.files.wordpress.com/2020/06/94738020886.pdf
    • https://timowasufu57836677.files.wordpress.com/2020/06/57003954820.pdf
    • https://sakeweter812408916.files.wordpress.com/2020/06/59113527749.pdf
    • https://nulazemak.files.wordpress.com/2020/06/7295387759.pdf
    • https://duravav.files.wordpress.com/2020/06/xizotibodopo.pdf
    • https://dutilexov.files.wordpress.com/2020/06/bevadidepoboz.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a4c0.bin
fdd59ab48e19b53e12de0f883c39217be2ab4acaf18715958eecfd891c63e1f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C0 11612 bytes

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