Malicious PDF — malware analysis report

Static analysis result for SHA-256 63253a90b43f092d…

MALICIOUS

PDF

33.4 KB Created: 2020-08-21 18:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb7b6e4f1442a27811e8b385df29f1be SHA-1: 3f9a8060b5f60899269a99d651ca43f25abab8fa SHA-256: 63253a90b43f092d54aecb81433a3342267218cc2955bc85c16a681445f33671
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates an attempt to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, and the document structure itself is the primary vector.

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/pify?keyword=balloonist+sf+font+free In PDF document text
    • http://files.mustangsmend.org/uploads/1/3/2/8/132816036/fa7b557e23b38d.pdfIn PDF document text
    • http://files.risawilliams.com/uploads/1/3/0/8/130814644/poxozokugogene_lutogoriwexibul_tonobar_gisemala.pdfIn PDF document text
    • http://files.esthervilleumc.com/uploads/1/3/0/8/130814877/desamadowotulu_gixedimi_domosatinem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/38174551668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9115/6380/files/sogewaxeborukiwofenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5286/7240/files/ruxirut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/warukozunowosimewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/91128296117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/33557495397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/doraxefawuvosoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/lapubigiwijitusixeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/3427272694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/28027627186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7930/6135/files/mazuwukebipubavume.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047c9.bin
af40c45b9e2ccb36d75b4806927249982bb6fe51c1fb1e29751998fc82b0adbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C9 4808 bytes
font_01_sfnt_off00005829.bin
6ffb425242e1d6c4fc3468e6e735ce9d66c8eeec8e1e5608f9ff36e6d06cec61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5829 9628 bytes

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