Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bf161710ceeb29…

MALICIOUS

PDF

58.4 KB Created: 2020-10-16 04:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bf41aeadb8941190476540dbd7251692 SHA-1: d910b17c768d17cfd3a8e0dc30747cbbd632ce47 SHA-256: a0bf161710ceeb29628e04b39e0b1acbcebedd293b58e3149d0984e4ce0e4197
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed to host numerous PDFs. The primary malicious URL identified is 'https://ttraff.link/pify?keyword=notification+android+studio+kotlin', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and another PDF hosted on strikinglycdn.com, suggesting a coordinated effort to distribute malicious content.

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.link/pify?keyword=notification+android+studio+kotlin In PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/tiremu-pusifowux-felonipusulokiv.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/1126145.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/74ae5439bbe84.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/ziwowubujus.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/17402828465.pdfIn PDF document text
    • https://site-1043910.mozfiles.com/files/1043910/venagetakagifakulafupoje.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/e455cb75-a077-433d-b2b5-3ed20b2436e1/gerukupopufuwozor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39add176-8e17-4a00-89f3-94a10ade683f/80921683741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0306d6c4-2dc7-43ef-b6c9-fa256fdabb22/buzadolikuxuromiraluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/642201de-1d01-4624-a1d8-fad523a5a591/xawaviwizibut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd92e830-40ca-4624-8720-91a406497f8d/dupega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643598f8-89ce-4219-bfc4-e2a310793e40/nokazedizozinama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4767/3752/files/add_prefix_number_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/best_tennis_rackets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4581/2893/files/2649018034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/adjusting_journal_entries_are_usually_dated_the.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_off0000a694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA694 5048 bytes
SHA-256: 7135ce032369485de245ffbf0ace9dcd955c288dd906b38af1172f2b6615299c
font_01_sfnt_off0000b7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D2 10772 bytes
SHA-256: 2fc8f40ac42e9fc93df098f221dea9c4019c03eddeef0699ec5163c4ffd86824

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