Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7f9789dbe7171a…

MALICIOUS

PDF

41.2 KB Created: 2020-07-15 14:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 2ab028840b0537ff38a86628db5e3ca4 SHA-1: 7e982f53d73bd707e95aadff39a83c3fe37d3ac9 SHA-256: 5d7f9789dbe7171ae9684b9a65a310eaa4a415b10559c3630df14bee18179d4b
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as a worksheet, but they redirect to a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm intended to drive traffic to potentially harmful content. The embedded links are likely part of a phishing or scam campaign.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=clause%20and%20phrases%20worksheets In PDF document text
    • http://files.glsgroupllc.com/uploads/1/3/0/7/130739922/1925766.pdfIn PDF document text
    • http://files.ccbreland.com/uploads/1/3/2/6/132681390/folozukolu.pdfIn PDF document text
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdfIn PDF document text
    • http://files.tonyottenauthor.com/uploads/1/3/1/4/131453924/847da69e.pdfIn PDF document text
    • http://files.atthehelmbluffton.com/uploads/1/3/0/9/130969986/xepanenulotakew-vekijimemun.pdfIn PDF document text
    • http://files.authorkimfox.com/uploads/1/3/1/3/131379612/kemunafejebos_furugamoros_vagububike_wivosoruda.pdfIn PDF document text
    • http://files.musicartssessions.com/uploads/1/3/1/0/131070895/jivegupobagiwimi.pdfIn PDF document text
    • http://files.ded4inclusion.com/uploads/1/3/0/7/130776249/8217263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://delusuvewep.files.wordpress.com/2020/06/xokumo.pdfIn PDF document text
    • https://babamapik.files.wordpress.com/2020/06/61670949359.pdfIn PDF document text
    • https://nemogodulivo.files.wordpress.com/2020/06/ronoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/94672517365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/diwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/jabogadikifakusululifizom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/bazemodapiseviluvufasomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/rosatalagugipexogab.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_off00006414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6414 5060 bytes
SHA-256: 98a054df0e28196fc39351f519f3f075db279a0409ec8f7ffe3dec1089a45b4c
font_01_sfnt_off0000754c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 10008 bytes
SHA-256: 5edc798635a50838d9f64ac3e5aadd337e01c3a5a9adfa711b9ff51adc30f8b7

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