Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7f28e67c42373a…

MALICIOUS

PDF

47.8 KB Created: 2020-07-28 10:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28ca60a6308e96e8eb841be545be3ec1 SHA-1: dc7d04efb258335b42bddb2adde262cf916591c3 SHA-256: 5c7f28e67c42373a003791ffdde39956b7c9233c55a4647352ae37a1974eb32f
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to distribute malicious content or manipulate search engine results. The ML classifier strongly flagged this PDF as malicious, and the presence of urgency language further supports a phishing or social engineering attack. No scripts were extracted, but the overall structure points to a malicious document designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=vietnam+cyber+information+security+law+2016
    • http://files.pearlblossommakeup.com/uploads/1/3/1/3/131380745/9714310.pdf
    • http://files.gllm.org/uploads/1/3/0/7/130740175/b27528abf.pdf
    • http://files.boundlessk9.com/uploads/1/3/0/8/130813762/9ff2a4.pdf
    • http://files.drpatriciafrischtak.com/uploads/1/3/1/8/131856039/nakivolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/gemonuzanigigebes.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/26552222621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/73056167301.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/11076646951.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/92746164259.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/golatedesezepubozoxaror.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/kububezasutil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/vaxago.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_off00007bc4.bin
2190314b3529d9735eee664c6bda18dc9840139e180a75ca9afbfff9d3b2fbf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 5688 bytes
font_01_sfnt_off00008f20.bin
194d4d4bd3d20d21bac7a389d0a99b891cd91c31e54273e8c215948ec4d819e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F20 10220 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.