Malicious PDF — malware analysis report

Static analysis result for SHA-256 883a47fede77c9e6…

MALICIOUS

PDF

37.8 KB Created: 2020-07-08 19:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 7f1c4d6fb0159d0a839ae9c51754acf8 SHA-1: 098b0d10015560b4f12008a2b508d5ef649eb6d9 SHA-256: 883a47fede77c9e6006bfc893cb370638e0e08e26cfd5c583142b9f3eafb9fc9
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, identified as a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/wb?keyword=kenmore%20sewing%20machine%20model%20385%20manual%20pdf, which is flagged as malicious. The document body, though partially obfuscated, also contains many of these URLs, reinforcing the link farm and redirection attack pattern. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/wb?keyword=kenmore%20sewing%20machine%20model%20385%20manual%20pdf In PDF document text
    • http://files.striba.net/uploads/1/3/1/3/131380413/9297027.pdfIn PDF document text
    • http://files.harborlandscape.net/uploads/1/3/0/8/130813768/b916affddd4d61.pdfIn PDF document text
    • http://files.companionsofchrist.org/uploads/1/3/0/9/130969375/3234800.pdfIn PDF document text
    • http://files.hkcofc.com/uploads/1/3/2/6/132683111/lobojevaresale_jojolurirukekof_nunaduwarutare_rulilik.pdfIn PDF document text
    • http://files.ifobookmarks.org/uploads/1/3/2/6/132696263/juvalezibanuni_dotuvopunojug_kelirixugex.pdfIn PDF document text
    • http://files.annaduttonbridalcouture.com/uploads/1/3/2/6/132681281/pugivuzaxifow.pdfIn PDF document text
    • http://files.thucsnet.org/uploads/1/3/0/9/130969907/950174ad0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://taxowedolez.files.wordpress.com/2020/07/mobiwisovum.pdfIn PDF document text
    • https://pimekib.files.wordpress.com/2020/07/60202856459.pdfIn PDF document text
    • https://zitipon.files.wordpress.com/2020/06/17969271942.pdfIn PDF document text
    • https://bedipivi.files.wordpress.com/2020/06/gomesuwutafunavulusukak.pdfIn PDF document text
    • https://zonaselid117862540.files.wordpress.com/2020/06/gaxonoposanuwo.pdfIn PDF document text
    • https://sixarunap.files.wordpress.com/2020/07/83178943336.pdfIn PDF document text
    • https://mebanebezog.files.wordpress.com/2020/07/fiwudujafafapikanadopaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.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_off00004fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB3 5912 bytes
SHA-256: e3c58db3ce2e005ea1083d4bb514ba81916f951c0c9df809e33d4ce6131c2131
font_01_sfnt_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 12184 bytes
SHA-256: e989bbfdb3ffb68585342995dc65fceb06a5a8df15db1c323e561cd7080d9323

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