Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d383d85e8a703af…

MALICIOUS

PDF

46.1 KB Created: 2020-07-09 02:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 1dfa430c67f419c1c7750ffa904a7405 SHA-1: cd9adcca1666ae2ff71f53ab5b544c06610af7db SHA-256: 6d383d85e8a703afad3c30bb7ecc8c9ec668fb8b0b42910aa977e1ca96741122
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another identified a large link farm hosted on disposable domains. The document body, though obfuscated, contains URLs that are likely part of this link farm, suggesting the primary purpose is to redirect users to malicious 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=an%20astrologer In PDF document text
    • http://files.quoisdesigns.com/uploads/1/3/1/8/131871720/3861814.pdfIn PDF document text
    • http://files.shopdovetail.com/uploads/1/3/1/6/131636746/varufi.pdfIn PDF document text
    • http://files.deewiegand.com/uploads/1/3/1/0/131069875/takivokonemafitujufo.pdfIn PDF document text
    • http://files.oddlogicbrewing.com/uploads/1/3/2/6/132682681/4135347.pdfIn PDF document text
    • http://files.decgallery.com/uploads/1/3/1/3/131384789/cc8b20d.pdfIn PDF document text
    • http://files.rejectrobotics.com/uploads/1/3/1/4/131412858/69fb380c026.pdfIn PDF document text
    • http://files.saravaughnskincare.com/uploads/1/3/1/8/131857818/refinexibosum.pdfIn PDF document text
    • http://files.daughtersofthemayflower.com/uploads/1/3/0/7/130775520/a25bef04.pdfIn PDF document text
    • http://files.alfurqaantours.com/uploads/1/3/1/4/131438468/856052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kuzujodo.files.wordpress.com/2020/06/dedojumuzu.pdfIn PDF document text
    • https://vefejavu.files.wordpress.com/2020/07/xumimerodugapepitezer.pdfIn PDF document text
    • https://jilabalaku.files.wordpress.com/2020/07/fimate.pdfIn PDF document text
    • https://xopaluwefaje.files.wordpress.com/2020/06/vugikitorivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.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_off000077f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F6 5072 bytes
SHA-256: 0e4fe23b07635d14f99e9bbc7228bbc294c402a6a270190892201dcdb8868e10
font_01_sfnt_off00008956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 10168 bytes
SHA-256: 3cc1bd2b193ad5135a700f824ab0615789173ac7cd5680701de36e0547ef0b35

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