Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90efd8d67276cb3…

MALICIOUS

PDF

38.4 KB Created: 2020-08-20 14:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5bd90bbe60981e25802b4261342b592 SHA-1: 664d8e750339492d2e205b50cdafdb939d066e22 SHA-256: f90efd8d67276cb3a8ac94bc32b07493a07fb75cae08ec4e31c2c4b47ca37650
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.cc/pify?keyword=viswasam+ajith+video+songs In PDF document text
    • http://files.positivesportcoaching.org/uploads/1/3/2/6/132681647/tomivexosa_bafid_telizojemasuje_wubonogedizo.pdfIn PDF document text
    • http://files.bryanadavenport.com/uploads/1/3/1/3/131398498/4c1fe46c6a9dc.pdfIn PDF document text
    • http://files.connectexperiencewrite.com/uploads/1/3/0/8/130814492/duxudipelizibun.pdfIn PDF document text
    • http://files.mmfineart.com/uploads/1/3/1/4/131438330/1e8c11d4bcc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/85337047224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/povopuzoxupubije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3871/6583/files/macos_catalina_beta_dmg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/pibozegijolep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/comment_apprendre_l_anglais_facilement_et_rapidement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/sisizufufirovubosasamiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/xiruwapejobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/46608413609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/jotuziwujuvemefowaxakaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/79915271246.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_off00004d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D22 5304 bytes
SHA-256: f79fa27416b17454f356fb4b3164fa60ca8fe6ff96a13ee48cb8819411aab0a4
font_01_sfnt_off00005f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 14916 bytes
SHA-256: d6a7ae31e0af83b1ed6b8f77b63ce4a01a4398710e9404fbaca06bb837af9ed1

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