Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ddbaa57081a9ef…

MALICIOUS

PDF

123.4 KB Created: 2020-07-08 20:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: afb7472d216aebf7de936b35a8698654 SHA-1: 194e667b319948848b860418f7965609fa5cf573 SHA-256: 70ddbaa57081a9efd324bda16565a77bb93c7dc29233397af67d7c6d4f7a6659
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which are designed to appear as search results for technical manuals. These links redirect to potentially malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier also strongly flagged this document as malicious. The primary intent appears to be directing users to harmful websites through a link farm.

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=ingersoll%20rand%20air%20compressor%20ssr%20up6-30-125%20manual In PDF document text
    • http://files.atmaanur.com/uploads/1/3/2/6/132681316/e10597ea4.pdfIn PDF document text
    • http://files.newbeginningswalworth.com/uploads/1/3/0/7/130776841/tunanazopab.pdfIn PDF document text
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.pdfIn PDF document text
    • http://files.juliewiegand.com/uploads/1/3/1/4/131453480/dd1b72145be5fa.pdfIn PDF document text
    • http://files.repaythis.com/uploads/1/3/0/7/130740180/3539141.pdfIn PDF document text
    • http://files.planninginblackandwhite.com/uploads/1/3/2/7/132710655/bobuzugipiz_renele_litazafurusagop.pdfIn PDF document text
    • http://files.pawsonthegroundcolorado.com/uploads/1/3/0/9/130969427/3365921.pdfIn PDF document text
    • http://files.artclassmosaics.org/uploads/1/3/1/4/131452803/5655933.pdfIn PDF document text
    • http://files.sanspointe.com/uploads/1/3/1/4/131407629/ximeziwogunag.pdfIn PDF document text
    • http://files.compusoftcanada.com/uploads/1/3/0/7/130776575/fa4463c9caa450.pdfIn PDF document text
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131409170/c416f2d8c877.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nodezebibun.files.wordpress.com/2020/06/65742386547.pdfIn PDF document text
    • https://xibupipoj.files.wordpress.com/2020/06/jeretuwemasujewevu.pdfIn PDF document text
    • https://kemujemurer.files.wordpress.com/2020/07/depimisafatalaxod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.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_off0001987c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1987C 5932 bytes
SHA-256: cba7dca2fc072f2a45ba64917380875bc942396ab3c38b1a3d7dc6d2e4fa8da4
font_01_sfnt_off0001ac90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC90 17392 bytes
SHA-256: 4109f8818ebc0c27d5cc8a592ce6c6f9df460d48f09257d076b2bc164bd887d5

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