Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1b6f6c64d8b56e…

MALICIOUS

PDF

43.7 KB Created: 2020-11-01 07:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2a13918ee518bb7810b428ca81019920 SHA-1: 13256a0e879fb7dc313910cecfb704cf32ea89fe SHA-256: ba1b6f6c64d8b56ea4e401a6cbbe0f11bfb9148cb75a7619970dbe4e6ce019c2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF SEO link farm, embedding numerous external links, one of which points to a potentially malicious redirector. The document body contains the same malicious URL, suggesting a phishing or malware distribution attempt.

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 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.
  • 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://cctraff.ru/aws?keyword=visit+drift+painted+durr+burger+head+in+a+single+match In PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/ronagisu_xopukadifukopep_puzozuvarifeb_kapagifobasevip.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/9b00d9d22.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/tujeviwakirawu/farmville_tropic_escape_free_gems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb01bb2-b09e-436d-9f93-2fca7016105c/50220676810.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/14873550981.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/jodupuwemejetesi.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/cantico_de_las_criaturas.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/70346602209.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/dulim.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/newton_metre_torque_wrench.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/80714251213.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/activity_1.1.3_gears_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/negugasatofumokekiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc87dc4b-1e64-48a3-be9c-b4f3f8cadf3d/80242136354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1a8989-00dd-45a0-800e-d80877cc4dac/93265248987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/panasonic_bread_maker_instructions_sd200.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_off00006bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB7 5676 bytes
SHA-256: af5270c008008904426f1e66d17de92e7a40bf41e46a7fd860e7047ec1db448f
font_01_sfnt_off00007eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDA 10048 bytes
SHA-256: 3966ee12125a4257984c23b21c984ffcdfcb8d7a7de9acbb16a9320e51c2b571

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