Malicious PDF — malware analysis report

Static analysis result for SHA-256 98bad170ee964b48…

MALICIOUS

PDF

67.3 KB Created: 2020-07-08 11:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 8d039097838a730eb032ece8f741d763 SHA-1: ef104ff4fff7bd62a441087ee31c5c2e6628c025 SHA-256: 98bad170ee964b48ef3459f756e4d7c7cf79ba7652092f0f2f5e6f6fffcad491
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) and then to other PDF files hosted on various domains. This indicates a link farm or SEO poisoning technique designed to lure users into downloading potentially malicious content. The primary lure appears to be a 'John Deere 210 operator's manual pdf'. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic firings strongly suggest a malicious redirector and a link farm.

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.com/wb?keyword=john%20deere%20210%20operator In PDF document text
    • http://files.icthope.org/uploads/1/3/1/4/131437753/6587094.pdfIn PDF document text
    • http://files.desertheartsphoenix.com/uploads/1/3/1/1/131163563/vodewavaguje.pdfIn PDF document text
    • http://files.goldenspiraldesigns.com/uploads/1/3/0/7/130740232/5083549.pdfIn PDF document text
    • http://files.vcgallery.org/uploads/1/3/1/8/131856381/rokererukirejakifu.pdfIn PDF document text
    • http://files.siouxfallsbirth.com/uploads/1/3/0/7/130775511/3588451.pdfIn PDF document text
    • http://files.navp.co.uk/uploads/1/3/0/9/130968956/kojiva_sapegitoxani.pdfIn PDF document text
    • http://files.mindrawise.com/uploads/1/3/1/3/131379290/fojinime.pdfIn PDF document text
    • http://files.rushizle.com/uploads/1/3/0/7/130776338/3326136.pdfIn PDF document text
    • http://files.mgtconcepts.com/uploads/1/3/1/4/131453725/pipadejirivuvo_gazugubagaxux_fugaradonebo.pdfIn PDF document text
    • http://files.spartanstoneworks.com/uploads/1/3/1/8/131856518/8050331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://basogobap.files.wordpress.com/2020/07/bubasafofuj.pdfIn PDF document text
    • https://perorukone.files.wordpress.com/2020/07/27510469873.pdfIn PDF document text
    • https://jipijitu.files.wordpress.com/2020/07/41078390619.pdfIn PDF document text
    • https://molejupo.files.wordpress.com/2020/06/55788700217.pdfIn PDF document text
    • https://ribixobu.files.wordpress.com/2020/06/dowosuk.pdfIn PDF document text
    • https://fakadepe.files.wordpress.com/2020/07/87883574349.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_off0000bb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB23 5464 bytes
SHA-256: c6275c02c5cf19992dbfdae1f542944f52506711ea619e472758eed57333d741
font_01_sfnt_off0000cd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8A 16500 bytes
SHA-256: aed0e825534a915d9030bad84be92a640bba1c84aa38acc08b405f71ce27ad49

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