Malicious PDF — malware analysis report

Static analysis result for SHA-256 35eaf1de5f84d276…

MALICIOUS

PDF

46.6 KB Created: 2020-10-29 12:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0aa13b86884e4f13e55d57810d1c6636 SHA-1: e202adf7de8b7dc72d5e7a92030e246affb648c4 SHA-256: 35eaf1de5f84d276f44fd79a7a3eb2b9893df52e3ff287753fc4d6f6a02883fc
194 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.
  • 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.link/pify?keyword=2000+nissan+xterra+gas+mileage In PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/berakubaroxi_fojugudepofat_debilugu.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/3034736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f8884fe98735.pdfIn PDF document text
    • https://norajinojo.weebly.com/uploads/1/3/4/3/134381333/31360a12459f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5f912996aa9f9.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/zeretokexomaxepimop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f94138adaed5.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/nijajobabola.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000752d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000752d.bin)
    • https://s3.amazonaws.com/gafedupeba/9206932554.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/95858346394.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/rixoletobebabol.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/teguduri.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/98734196313.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/34721890502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1764/9821/files/xiaomi_airdots_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/boy_scouts_medical_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1066/8724/files/96518914128.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/32028043890.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/70913656158.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/46053492567.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_off0000752d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000752d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 5252 bytes
SHA-256: 2a4f2a04e9506f074fc4bf00404f605f151da1c6c4d4ceea7ca14eec43c83e2f
font_01_sfnt_off000086f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F7 11152 bytes
SHA-256: 2337aea77bd05f9c6f0cd0657312bab5593d0b4658181111cd2397154088d155