Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d8e5e283e3d519…

MALICIOUS

PDF

46.1 KB Created: 2020-10-23 11:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 60f3165c14bb6e1c7b97e601d37ea27c SHA-1: 3ecd7014ae28a395c750382a86fa320a76fee80d SHA-256: 54d8e5e283e3d519a6c72c9e3b6a56c1fd9e3db30b233eb2e6b4b6258fecb608
184 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.
  • 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://gettraff.ru/aws?keyword=glucemia+postprandial+valores+normales+pdf In PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/e5405fdf4b1c6f.pdfIn PDF document text
    • https://togasiwivote.weebly.com/uploads/1/3/4/3/134370981/momowasipo_momemurejo_kevavegi_sudidevamoz.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/9e8409928.pdfIn PDF document text
    • https://besogedawifajop.weebly.com/uploads/1/3/4/2/134234635/1702852.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/tixinazilesu-farebi-jukew-zidogobeta.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/1032012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f88d1975e66f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f8a16b81dab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f9278f123375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f8fff20880f8.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/henghuili-files/zibadufoduzepumudojoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310da772-0235-4188-aa05-14ce9139f8e2/94019653579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2530e8b-56e3-4b97-a0b1-3feef56cac1a/22831776491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca85678-a4df-488d-ae0d-cb0ebf19a2f7/92367389731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a56216-59f2-4b83-8db4-6ff36b113372/moxevenom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630cd982-64c8-4848-8d6d-263ad00476cb/30192929007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6951/4404/files/ruxixoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3879/1582/files/english_exercises_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3332/8278/files/93659593120.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_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 5392 bytes
SHA-256: 234fd04ae345befd5bc64cb50590cc4156a7920645441f04e328cad946415f95
font_01_sfnt_off00008600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8600 11048 bytes
SHA-256: 0ccb37293bb34e4a05eb42fa0da405e55ff1b03b4d88b15fbded050d85ee38b8

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