Malicious PDF — malware analysis report

Static analysis result for SHA-256 1393ded2488c0e63…

MALICIOUS

PDF

42.5 KB Created: 2020-07-09 06:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 18233d65a4985010f94c95ecd28faf9d SHA-1: dce9e00ecc52be8369dd07c1c33cc76201d0159d SHA-256: 1393ded2488c0e63109018cdc26dafef1bd4a0787460133fa565dc2c92b38826
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious due to its extensive use of embedded links pointing to redirector infrastructure and potentially malicious content. The document body contains obfuscated text and a primary URL, https://ttraff.com/wb?keyword=cucaracha%20periplaneta%20americana%20pdf, which is likely part of a phishing or SEO poisoning campaign. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting the document's primary purpose is to drive traffic to numerous other sites.

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=cucaracha%20periplaneta%20americana%20pdf In PDF document text
    • http://files.nftebayarea.org/uploads/1/3/2/3/132303378/wibopejaf.pdfIn PDF document text
    • http://files.friendshcls.org/uploads/1/3/1/8/131871467/6a03116cf28c.pdfIn PDF document text
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdfIn PDF document text
    • http://files.mollygaston.com/uploads/1/3/0/7/130738845/luras-muruviparewe-piwujor-bilaxew.pdfIn PDF document text
    • http://files.stanthonyschoolsg.org/uploads/1/3/0/7/130739419/cd9140f865.pdfIn PDF document text
    • http://files.telaadvisor.com/uploads/1/3/1/3/131381411/jinoxa.pdfIn PDF document text
    • http://files.insightsandilluminations.com/uploads/1/3/1/4/131453045/485ba9ebd953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://laderowo.files.wordpress.com/2020/07/dopexuzigejufi.pdfIn PDF document text
    • https://dirubupu.files.wordpress.com/2020/07/86513971557.pdfIn PDF document text
    • https://gijafodopaw.files.wordpress.com/2020/07/56806842249.pdfIn PDF document text
    • https://zijumaxiwigu.files.wordpress.com/2020/07/kajuwipajomaxokuzefevazu.pdfIn PDF document text
    • https://zufarosivalu.files.wordpress.com/2020/06/7693476273.pdfIn PDF document text
    • https://todufedok.files.wordpress.com/2020/06/20952128694.pdfIn PDF document text
    • https://ripituwuwi.files.wordpress.com/2020/07/90574251061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.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_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 5012 bytes
SHA-256: b340897db7a7fbdbc0a9dd47b70d15ce4ed45e73394cae41058fb2e55b210455
font_01_sfnt_off000076ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 11136 bytes
SHA-256: a7c2ad6dda530e2ee06a688a477d110b085c8dd79ea971c9d3f998abaed5ee24

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