Malicious PDF — malware analysis report

Static analysis result for SHA-256 50dd345290a206d1…

MALICIOUS

PDF

44.2 KB Created: 2020-10-12 00:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f63872a81bae9fec8d8cf79803c82167 SHA-1: 6b18269277799c1db71118c0c929cb79a4e8a6bc SHA-256: 50dd345290a206d1240afc70e9bb22c9fe4435294de8fb2f0b8cc40580a14a04
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.club/pify?keyword=potassium+sulfide+formula In PDF document text
    • https://site-1039963.mozfiles.com/files/1039963/78561258166.pdfIn PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/kuxuroga.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/48179645281.pdfIn PDF document text
    • https://site-1043885.mozfiles.com/files/1043885/34972660835.pdfIn PDF document text
    • http://files.kennelcomaster.com/uploads/1/3/1/3/131380177/daxokegekepux.pdfIn PDF document text
    • http://kejeweven.bellacanineconstruction.com/uploads/1/3/1/4/131482997/3523255.pdfIn PDF document text
    • http://dexidoro.isolahandmadeoriginals.com/uploads/1/3/0/9/130969521/4480132.pdfIn PDF document text
    • http://files.samschmitz.com/uploads/1/3/1/1/131163620/rekumopiwap.pdfIn PDF document text
    • http://files.prli.us/uploads/1/3/2/6/132680976/2689579.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/12e0f62e-04ed-4072-929c-a64b7dc68574/ruwewogunewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/xuzadopalesupivonabegewaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8747/0248/files/viva_3_tires_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/formed_elements_of_blood_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6764/0470/files/sidirolilal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4979/7790/files/bawutebiwadenavod.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_off00006ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 5052 bytes
SHA-256: 54ea088e7c50561796492ca4d7885822a904af516eade306fa3ebc9364245307
font_01_sfnt_off00008104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 10304 bytes
SHA-256: ec005c76669227a5656e0e0267b76bd5a4a7d5345e3217eec4cc82d81cc38ed4

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