Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bb89ec83bf6fe4…

MALICIOUS

PDF

46.2 KB Created: 2020-10-28 09:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 44d5e8e94237967b82838ee3c800fd4f SHA-1: 413b2f3effb12d1fc9708e995e2db10adf5f2286 SHA-256: b2bb89ec83bf6fe451c3442e4fd21c2a87afa775c4d985fdb8cbf4b0c56cbe38
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded document body also contains the same URL, suggesting a lure to download further content. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to redirect users.

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://ttraff.me/123?keyword=xcom+enemy+unknown+guide+steam In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f879a3abd0e6.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/rigajeviwor_megasunip_pezojopip.pdfIn PDF document text
    • https://sivirezu.weebly.com/uploads/1/3/4/4/134445297/9180147.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/tiletezenanukaze.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://zubosaverebaf.weebly.com/uploads/1/3/4/4/134468350/da12542ccb7acd.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/1/0496/0990/0183/files/30981851163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1213/6855/files/free_receipt_maker_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/wofitozipuvugurowolez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5767/5932/files/zenidifatebuva.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/47876961769.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/les_adjectifs_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6029b22d-77f1-46ac-82b7-8bf936db2d15/37728928997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca9ab6a-c463-42e5-9736-f5a723a82707/padepitazut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a419eb25-3e49-447d-9ea3-42bdc78a1589/fidelis_essential_plan_income_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4af03c8-10c8-48d4-b72b-9adea2f76b8a/kilaruxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2297/4627/files/65707251246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7850/8440/files/manual_leather_sewing_machine_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/la_insoportable_levedad_del_ser_milan_kundera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7484/5375/files/multiplication_strategies_with_multiples_of_10_worksheet.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_off000074a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A6 5364 bytes
SHA-256: 4b31e5d1d55ac5f7d34fdc9ae4818ba15c7eba56d0e966c0280528145122ea77
font_01_sfnt_off000086ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EC 10644 bytes
SHA-256: ea207ccdf6e61ea2c688e6623140ecae4a57fc2da54de63ca2b258de59f06aa2

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