Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e2f211af32f385…

MALICIOUS

PDF

35.9 KB Created: 2020-07-10 14:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 4f4a628e6095a7b6c2015e7f3d3939b9 SHA-1: fe7a2195119d48a83fd6707bd346444c0f0a55c4 SHA-256: 66e2f211af32f385f4cdb147643bc56fe1329df4033b47d93597e618dc16872c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, constituting a link farm. Several of these URLs point to known malicious redirector infrastructure, indicating an intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=surya+arghya+mantra+pdf In PDF document text
    • http://files.homeorganic.com/uploads/1/3/0/7/130739067/zoradewawab.pdfIn PDF document text
    • http://files.savalotmovers.org/uploads/1/3/2/7/132741155/motamiredokidel_kigologidin.pdfIn PDF document text
    • http://files.kulmschool.com/uploads/1/3/1/6/131606368/rinikipajamamo.pdfIn PDF document text
    • http://files.insearchofbees.com/uploads/1/3/1/4/131405948/9851374.pdfIn PDF document text
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdfIn PDF document text
    • http://files.amandadixonlmhc.com/uploads/1/3/1/4/131454850/403142e03b1c.pdfIn PDF document text
    • http://files.clubvaultitudetexas.com/uploads/1/3/1/3/131398252/wewofirinipabup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nopudup.files.wordpress.com/2020/06/77248658057.pdfIn PDF document text
    • https://xidiseso.files.wordpress.com/2020/07/lugonozomulurejadefov.pdfIn PDF document text
    • https://zufiwupaned.files.wordpress.com/2020/06/jiforajo.pdfIn PDF document text
    • https://garuwade.files.wordpress.com/2020/06/bodeg.pdfIn PDF document text
    • https://pubixof.files.wordpress.com/2020/07/17262515613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/pesetenepijixeperav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/26969008938.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_off000050d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 5056 bytes
SHA-256: f2d753aacb6cf18deef3caaa29bebdb0687108a1dd1ecc0a9094e7cdb1983c8b
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 9612 bytes
SHA-256: 860367ea9371c6f0f5001817ab0621f2091de6769e3bfc4afcdb96329b6b57bc

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