Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc621936ffa1239…

MALICIOUS

PDF

43.7 KB Created: 2020-10-29 00:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 39d149016a428cdcc325c66488b46904 SHA-1: 77b05238818ea13d2bc646d06720ca91d2ed1ad6 SHA-256: 1cc621936ffa1239d0e206f873664b8c63cf6e86f7b3203e796742c9211a0c11
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=jersey+auction+live In PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/b7410a8.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/xomijediseku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f87c47e87e66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5f99eb993b459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5f99eafbc6d61.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006aa2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006aa2.bin)
    • https://s3.amazonaws.com/pazifetanegapu/1_goal_free_education_for_all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/bathroom_cleaning_checklist_template.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/business_partnership_proposal_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/96830325980.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/59109151416.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/fonction_de_l_appareil_de_golgi.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/1666718966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4237/2260/files/sejarah_gerakan_feminisme.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/calculus_solved_problems_ktu.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/80516168514.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/ritual_de_amor_proprio.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/64118892903.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/gatajato.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/mexenaput.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_off00006aa2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA2 4944 bytes
SHA-256: 3b4be90ab935a863501ebf73b4ded894c7062013bb266d765566351a44184d6c
font_01_sfnt_off00007b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8D 11308 bytes
SHA-256: 941f53e2b44f832777fbc3d4367f09369877ba393f84eb67bd3cca1930b6239f