Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dd5af7fa2b706e…

MALICIOUS

PDF

41.5 KB Created: 2020-10-01 20:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c0a7ef7344a09417b4c5c3bce9ff40e7 SHA-1: 6849a66290b6f1baa5742e52c877410bbf706987 SHA-256: 47dd5af7fa2b706ece68c9faa752cfa1fef7148d6fa7298b913b06a0214db613
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external links, including one identified as a malicious redirector. The document body, though partially corrupted, contains the text 'Cave spring high school renovation' and the malicious URL 'https://ttraff.link/pify?keyword=cave+spring+high+school+renovation', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=cave+spring+high+school+renovation In PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/56417883521.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/13605222301.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/menapu.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/gofedepiwiwigatozibi.pdfIn PDF document text
    • https://site-1037902.mozfiles.com/files/1037902/28980204051.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/49300705819.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/pidubivodawevifoxuwizi.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/xaparune.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/97017617469.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/1/0493/4418/4474/files/ms_tech_ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7157/2634/files/oak_for_less.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/jatirakejowavinesigunir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3544/6433/files/60548705542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9f3fef-d72b-4869-8635-8eefbec8e030/gabuxudizexapobum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3d014a-30a5-40a8-9885-42f81209b426/90396334430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85adaa41-00ba-459c-b29d-0db957a7e609/13496876803.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_off00006464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 5160 bytes
SHA-256: 6571be6ef5ff8fe8cfa732a212be72eda52f6cb4ea228b5041c195b03a5b6672
font_01_sfnt_off000075f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 10188 bytes
SHA-256: e322434179c54d8afa06c7775eb1d23b377f46c41d440e8e6d3df2537dc91835

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