Malicious PDF — malware analysis report

Static analysis result for SHA-256 344f5670ce563c23…

MALICIOUS

PDF

39.3 KB Created: 2020-10-27 14:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 14aae1fbd83ebcb9c268dd149fe05abc SHA-1: b8441a5957600cd301be9bf11b8f67e373e3548f SHA-256: 344f5670ce563c2337a5e0371616326064dfdfc7405fd2816ceb94fcdb95488e
184 Risk Score

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.link/123?keyword=sutter+roseville+hospital+map In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f91fae4a1d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f97ba2622064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5f91fa39c64bb.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/2198c20.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/7706681.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/7578434.pdfIn PDF document text
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/9328372.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/vigakoxewiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8fa25d95288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f91f7dc318e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f90e567dc4f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f957e5f08640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f8787ab804dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005997.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005997.bin)
    • https://cdn.shopify.com/s/files/1/0501/9821/6858/files/famedgram_old_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5067/8464/files/seven_nation_army_pep_band.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7862/4439/files/android_phone_browser_hijacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1270/8293/files/ipcc_standards_on_auditing_short_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd1affe0-1451-4195-b490-6a3d836435bd/18235079956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd68419a-8a02-40e6-8812-231bd8e11824/lezegatogezawig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/how_to_upload_image_using_retrofit_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5890/files/c_multiline_string.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5849/0275/files/detugo.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 extracted file (font_00_sfnt_off00005997.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5997 5224 bytes
SHA-256: d1bf34b351a454b8ec9893a1e830ad9818c1c544b651794d759718da7a6435e1
font_01_sfnt_off00006b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 10808 bytes
SHA-256: c4e565f02d62da6c36df641e0aa54c0e956ab9f68d9c0b2a3567a09a020a1ae5