Malicious PDF — malware analysis report

Static analysis result for SHA-256 973d31aa997c9103…

MALICIOUS

PDF

32.9 KB Created: 2020-10-31 09:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2752fe330cd484a3dac7313aceae6861 SHA-1: 88143c17615d84099f95690dfb0fe5cbfb269370 SHA-256: 973d31aa997c91039723847f8236f71b0e557bc1a9c75eac7e77ab6ed542e8d0
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised within the document's content, aiming to trick the user into clicking it. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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/123?keyword=philly+cream+cheese+dips In PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/kikuviwarelazu_bilug_mazowuti_wolasaja.pdfIn PDF document text
    • https://gemiwanot.weebly.com/uploads/1/3/4/4/134495393/nuxeleponipin.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/lekupiwuxo.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/libosokune/bookmark_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/types_of_memes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1954/8864/files/15804641382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae81d32-fe73-419e-a12d-d48da2ac547c/16159143699.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/apprendre_anglais_gratuit.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_off00004271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4271 5416 bytes
SHA-256: 6c74556eb25c730238066a73973639cde6e7d668c1a41af4f80dd23af5d8464d
font_01_sfnt_off000054be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54BE 10236 bytes
SHA-256: d2f3a76e5eb46f48503c32bd88422b2872cedf3857ae31e308a4b61053d0cdb0

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