Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ff7fc3ae20c2a4…

MALICIOUS

PDF

34.4 KB Created: 2020-10-16 15:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ef5e97d3739f26f93732ad8eb881d5c5 SHA-1: 7647df05ac6cffc10f172b2ffe821d2c3433c6a7 SHA-256: 57ff7fc3ae20c2a404a5e52388524c6ce698249c01430b464570cc3274905224
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://gettraff.ru/123?keyword=abb+mv+switchgear+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f87db8cbb9b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f89724fb5541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87044a60d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f8818bcdbbcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f881df3a417d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f875dbd50f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8729b9d6831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870afce0df0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f875c80e6c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f8940643ebba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f86fed07983d.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/a2bf9e7b5b332.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/408cbd41f222.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37715433-4892-4d73-a02f-2a75d1681ba6/muwotujujafolujegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1b8f66-bc40-4e59-aef4-129cf3b30ca8/fodopapijisuwijobafas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e46b97-787b-4dd8-8c0d-9edd80023d4f/ximedexugipojajigivawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997805ce-7177-4f96-a152-877766527bb0/41779788683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23fe1f4-8692-4e9b-beee-3d8721cedaa0/zasewipoboninijekegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bf4f16-4b60-48e4-95e4-a7b53783b577/walopokedutiwegelo.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_off00004b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B0E 5852 bytes
SHA-256: 2e182fdc0183238bfd31ac0fd608b9eefa57070a3c8b38060af75c842fe6e790
font_01_sfnt_off00005ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE3 8596 bytes
SHA-256: 43217fd1e0d7182c5dd7decf1d6800ae3312ddab0cc12beec5f2ee65c9ed9489