Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fff6aa4b8a4758f…

MALICIOUS

PDF

45.5 KB Created: 2020-11-03 19:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: faff8bd037dc01b8f50672b70858e69b SHA-1: e51053bf2cf6f82ae0036a2d9570ee7367855cfc SHA-256: 8fff6aa4b8a4758f00c55d048e6dee1d404574c8855a0108542d4b19aa530347
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and text related to game downloads, designed to trick users into clicking a link. The primary malicious URL, https://ttraff.cc/123, is identified as a redirector to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.cc/123?keyword=super+mario+bros+3d+world+rom+download In PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/wasujodojan.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/vilagonapik-muvoveworoj.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/naxew-nelosigevuj-sogamo.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/fozijiba-liribadiri-pabevuxes.pdfIn PDF document text
    • https://warakamaluxib.weebly.com/uploads/1/3/4/3/134378328/zunuvelefeta-redutinet-jesasixadopa-potaruzozonez.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/3d7af44.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/kumam-berifozex-rebiwegaxobanev-lajag.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/ponuzeligax.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/2937618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zosevid/42279415306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4fc24d8-6eef-4e02-8f8c-c68912dce8fc/xofifumizag.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/runesipofufamosekoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0bbded-2589-4eac-931a-535ef93384c0/what_is_a_text_mail_subscriber_phone_number.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 5604 bytes
SHA-256: d281fd1edc9d534450b02f01ee3943cc1354550d106dfbca207e54295d1c2014
font_01_sfnt_off0000849d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849D 10568 bytes
SHA-256: 4f0659ac3bbf4a87feaf8f03a739bb435cd7add7f5905725c34a4eca98521f0b

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