Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5dde84ebcabc5a…

MALICIOUS

PDF

40.6 KB Created: 2020-10-06 15:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eb2fa40804a0610eaebe176e6047572b SHA-1: eaa575fa3abaf1c0454eeecb1668dc4efb5bd26f SHA-256: 6d5dde84ebcabc5a916a75b8c745460a1952130c2e86a820ad34405e33546694
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded link suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=sample+speech+intelligibility+goals In PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/fibejiwo.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/najujumilesot.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/xazesinedudefunezep.pdfIn PDF document text
    • https://site-1038973.mozfiles.com/files/1038973/11630098031.pdfIn PDF document text
    • http://nagaselir.dancingravenstoneworks.com/uploads/1/3/0/7/130738720/5094809.pdfIn PDF document text
    • http://files.pros2gogolf.com/uploads/1/3/1/6/131606368/xetujebeti_tupax.pdfIn PDF document text
    • http://files.jessicalyonslmft.com/uploads/1/3/2/6/132695455/mejuvaperixeza_nopafukorigexur_xexojunupidolip_samiza.pdfIn PDF document text
    • http://files.yogaforvitalitywithashton.com/uploads/1/3/1/6/131637055/roxatodunuf-reged-rinija-lawexazesesa.pdfIn PDF document text
    • http://files.calsafe.net/uploads/1/3/1/8/131871979/6304267.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/c53dc477-177b-4c3e-b118-ce49964aca8c/konibotaxatozopadesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a9545e-f7f7-4e0f-b1f0-0e8704638125/kepixine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de18a3c-3f07-48df-a146-a6fb0b4751c8/58650506036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec93a70-4d09-4076-85b3-3e3bb252b1f3/barelilazado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5c4da0-2862-43ce-b298-5714171c8a02/94087792837.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_off00006040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6040 5596 bytes
SHA-256: 3f634139805acd4e7b4a923ac4242984f2a1421f429f839ee40f6248d648f721
font_01_sfnt_off00007326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7326 9988 bytes
SHA-256: b6aff4cbfef4bfab27a8323b3be038283e3f04622aae632386e732a843241637

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