Malicious PDF — malware analysis report

Static analysis result for SHA-256 54616beff3567c4d…

MALICIOUS

PDF

40.4 KB Created: 2020-10-07 07:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f8d592eb9ce54d3d0498011fa01db244 SHA-1: 3d6cd20da3f320889e0b16bc097576072ce0d5c6 SHA-256: 54616beff3567c4d7a80f167adf99dbf46ba06bea73fe051966d4309f9a0c78e
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://ttraff.link/pify?keyword=how+to+clean+a+clarinet+ligature In PDF document text
    • https://site-1043538.mozfiles.com/files/1043538/89030821622.pdfIn PDF document text
    • https://site-1048530.mozfiles.com/files/1048530/80631734214.pdfIn PDF document text
    • https://site-1043810.mozfiles.com/files/1043810/19432059296.pdfIn PDF document text
    • http://vawukomox.deborahmauldinlicsw.com/uploads/1/3/1/3/131383965/d13b46.pdfIn PDF document text
    • http://files.amazingbooksandrecords.com/uploads/1/3/1/6/131637035/1800662.pdfIn PDF document text
    • http://menazelo.hinesburgnurseryschool.org/uploads/1/3/2/6/132682646/1455438.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/1/0478/7273/7446/files/baxobanikufufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8379/9459/files/how_to_draw_a_pyramid_in_solidworks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4492/9690/files/tasapetiriwiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/duo-therm_59516_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2907fbf-15de-4d4e-a022-9a0725b41f53/74659293179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e731c9-cac8-4e0c-9abd-6fc3eecbad9c/numowasiwixogorerolimisal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623b91df-6b3f-461d-a9f9-736001b2dcff/4809118689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96c8be6-109a-43cd-98d5-cada015142fa/31932563864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4ccc9b-bdff-4f22-b7b7-13f2351d9c12/41374692922.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_off000061c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 4844 bytes
SHA-256: 53547cde98a6198e19866623a8dd9052d9fa6fb42204e57796813cf9e9dc129f
font_01_sfnt_off0000725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 10060 bytes
SHA-256: b9e5aaf9507779b90a808549dfafb24fa5c021afcc074fcb09934c113f894b62

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