Malicious PDF — malware analysis report

Static analysis result for SHA-256 705fa245b02e0543…

MALICIOUS

PDF

42.9 KB Created: 2020-10-01 20:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7e3b02c55dd7f604a09d940a67e2f6e0 SHA-1: d0791519009d994389aa646585e64e7845dd4eb8 SHA-256: 705fa245b02e054352e4365e49b53174ed78b0fef9daaa382be9847b8a035375
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are part of a link farm designed to host other PDFs. One prominent URL, https://ttraff.club/pify?keyword=dilation%252Ftranslation+worksheet+answers, is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'worksheet answers', indicating a social engineering attempt to entice users to click the malicious links.

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.club/pify?keyword=dilation%252Ftranslation+worksheet+answers In PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/muwov.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/xozafifebo.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/nofejupunumerarejiwen.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/winelinitatewivofiz.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/49348854660.pdfIn PDF document text
    • http://files.tromakenerji.com/uploads/1/3/2/6/132683357/9f549.pdfIn PDF document text
    • http://febiger.soundisme.com/uploads/1/3/1/1/131163634/a62353d6a.pdfIn PDF document text
    • http://files.cycle4lifebw.com/uploads/1/3/1/4/131438098/3145511.pdfIn PDF document text
    • http://files.knitbuds.com/uploads/1/3/1/3/131383283/4254074.pdfIn PDF document text
    • http://pawire.mrgrenier.com/uploads/1/3/1/3/131398589/f477a8bc13.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/1/0486/1693/1486/files/spatial_distribution_definition_and_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/88523817715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/jarufijofax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/rl_stine_fear_street_books_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0a2ee4-136f-499d-976d-0b4c793a6ddd/63643703165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f8569e-2db3-40f9-9f76-39163cff8f86/bizit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bd281e-d41d-4542-8f99-23783a03d251/10289894235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c07f39-7a4b-4418-9528-17fd132807a0/xateba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb460de3-824f-47fd-a63b-af25aefd5000/fekotutakex.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_off00006b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2C 4964 bytes
SHA-256: c6d62cd4986706740aef0966f46a1dc610cc69d538793354a9b8b196ad023e87
font_01_sfnt_off00007c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 9916 bytes
SHA-256: 00703c1572183a8f8eb16e6f47bbb42f937c34565420ff107544f8622d40f2b2

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