Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ede25b4d600848…

MALICIOUS

PDF

45.9 KB Created: 2020-10-06 12:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 70375ce1f55199ff365c7008a74c0bf0 SHA-1: 7a9457ba8fdd8c612aafb7bc4d17fd02913d1639 SHA-256: d8ede25b4d600848ce72cc122c421fd8c0a9aa6b62810a1f5a0ae35750d16291
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.club/pify?keyword=engineering+mechanics+dynamics+8th+edition In PDF document text
    • http://files.wcfs.net/uploads/1/3/1/0/131070131/vubuzulixu-sawopunobuzu-sovonutule-buxobiwojufaxid.pdfIn PDF document text
    • http://files.missionviejoclassic.com/uploads/1/3/2/7/132741334/wuberug.pdfIn PDF document text
    • http://xuxuto.malvernehslibrary.com/uploads/1/3/0/7/130775982/620022.pdfIn PDF document text
    • http://zovon.myelitestaffinggroup.com/uploads/1/3/0/7/130738632/zuzutifapopefu.pdfIn PDF document text
    • http://files.passionistsglasgow.com/uploads/1/3/0/9/130969485/ecc02a4e0ae3.pdfIn PDF document text
    • http://dilab.tomhayes.uk/uploads/1/3/2/8/132815000/0611d7d24adc5.pdfIn PDF document text
    • http://vedaworu.cdsacademy.co.uk/uploads/1/3/1/3/131378776/rafizik.pdfIn PDF document text
    • http://jumawe.sinai-horeb.com/uploads/1/3/1/4/131483830/juwogokisoz.pdfIn PDF document text
    • http://files.dianafordham.com/uploads/1/3/0/7/130740210/rowot_xovikumetizena_sanakape.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/1/0486/1974/9534/files/lodge_combo_cooker_sourdough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/monozejavigewokunewebozik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0796/2018/files/3ds_max_vs_maya_for_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/philips_shoqbox_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/mares_puck_manual.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_off00006c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C91 5576 bytes
SHA-256: 07f9c59e393962183883a8d96a97601e11b28c262718f6e3adf59c853a3a93b0
font_01_sfnt_off00007f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F66 13724 bytes
SHA-256: 98c4e313c9d80d06827b1600ebd43dfe96d56331562d258c73bcc3a24b8f7e46