Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d53405bc708ec7d…

MALICIOUS

PDF

36.7 KB Created: 2020-07-10 07:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 33c15c774259d8aac63babe0a4d9771a SHA-1: bc6b452d8b50f06a832787a0a2400ce826ea575d SHA-256: 3d53405bc708ec7d23f85cf256de087cf51ffca810449b7df292c88e6f1e6d06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links designed to redirect users to a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary redirector URLs is https://ttraff.com/wb?keyword=women's%20citizen%20eco%20drive%20watch%20manual, which is flagged as malicious. The document body, though partially garbled, also contains this URL, suggesting a lure to disguise the malicious redirection. The ML classifier strongly supports the malicious nature of this PDF.

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=women In PDF document text
    • http://files.dockconnectionllc.com/uploads/1/3/1/1/131164311/gavij.pdfIn PDF document text
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdfIn PDF document text
    • http://files.shelleyartgroup.com/uploads/1/3/1/3/131380901/tifisifizasoz.pdfIn PDF document text
    • http://files.nalalumni.org/uploads/1/3/0/7/130740458/ramuneb-pakaleti-jivezala-vifazomi.pdfIn PDF document text
    • http://files.spiritualfringe.com/uploads/1/3/2/6/132681316/zozibekidare.pdfIn PDF document text
    • http://files.authorizedealers.com/uploads/1/3/2/6/132695874/lizujak_vojurixabaneki_duvononisuteji.pdfIn PDF document text
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdfIn PDF document text
    • http://files.musicunderquarantine.com/uploads/1/3/0/8/130874213/7983767.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wawinoxinej.files.wordpress.com/2020/07/36599216615.pdfIn PDF document text
    • https://duxadaforege.files.wordpress.com/2020/07/fividamagiwakazafunowesif.pdfIn PDF document text
    • https://wogitopezola.files.wordpress.com/2020/07/510406581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F93 5308 bytes
SHA-256: be3d216ae68c38a25e03939a97c13939ed37943c47bab2ad38de0882f2b487ac
font_01_sfnt_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 11132 bytes
SHA-256: 76e45ab4441959e3c805e6abaf4563b8f469332dc78bee9c523a7a123a46748a

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