Malicious PDF — malware analysis report

Static analysis result for SHA-256 4040cdd74d875ae3…

MALICIOUS

PDF

41.0 KB Created: 2020-10-09 00:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 259a2dc2f505bf90f3c52ca38050d9cb SHA-1: 14dbdfa44b61126cf6759bff8882873ebc01a393 SHA-256: 4040cdd74d875ae36b92cbe87f81ea822eb267ce8367fb88c8ee387ee312bf82
264 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/pify?keyword=periscope+for+pc In PDF document text
    • https://site-1048454.mozfiles.com/files/1048454/16496307556.pdfIn PDF document text
    • https://site-1039000.mozfiles.com/files/1039000/rukorapukigadifabigewovar.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/vukudikenenu.pdfIn PDF document text
    • https://site-1040213.mozfiles.com/files/1040213/5586654257.pdfIn PDF document text
    • http://files.ysgolbroingli.com/uploads/1/3/0/7/130740298/zefote.pdfIn PDF document text
    • http://volewu.scorpionbikewheels.com/uploads/1/3/1/6/131607254/buximidapipokerubesu.pdfIn PDF document text
    • http://files.chaminadechoirs.org/uploads/1/3/0/7/130775511/xaxudanavebex.pdfIn PDF document text
    • http://geriwaram.dlambertauthor.com/uploads/1/3/0/9/130969628/limimiwosufaveb.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/1/0433/3623/7206/files/nedipaliwego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/donald_trump_never_give_up_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/act_1_the_crucible_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661a8fda-ae3e-42e1-8bdc-3a5d9d4809ff/37002658111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a1ec4b-c8b2-408e-9b5e-99b1a42c1655/repesujuxatuzoginasupades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68cfa628-990d-436d-ab04-1b52febd22d7/fiwidiseruwaposet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E6 4768 bytes
SHA-256: 3bbe76f3b03c9bd2628dea77517594ea3c05c4282539f830f374154636b6d2f8
font_01_sfnt_off00007334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7334 11160 bytes
SHA-256: 565d2321153364a2f3bb4bc3a627c2004bcc38eabd671a5a80964d6643b75923

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