Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2b7091bef2e633…

MALICIOUS

PDF

46.7 KB Created: 2020-09-05 19:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0e9760622f89c71e1864e2a6fa34e778 SHA-1: d402b6bac429e36b50715e63a1be0767db265746 SHA-256: fe2b7091bef2e633da2a10590893057783680079bad572c15924ef7dcce6802e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/wix?keyword=abordagem+qualitativa+conceito+pdf In 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/1/0439/3605/5454/files/castlevania_3_prelude_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/55947411485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1921/4758/files/72740022624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/haccp_guidelines_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b3bc21_fc1ee1c5708246a6a60e376db8b9ce27.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e1900_b96456669e954ea68860fa009a92e47d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_01fac31c07364ba190484afae6da9376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/exerccios_de_bioenergtica_alexander_lowen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/video_questions_cracking_your_genetic_code_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/4454997310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/98153492165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8036/8796/files/23548443190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/10568903514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1606/0061/files/zogebibufu.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_off000075c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C4 5612 bytes
SHA-256: ab2b31bec6480f158de787ed31faf6f2c647ec78075e1995b6bdff5c1539ccb2
font_01_sfnt_off000088c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C5 11796 bytes
SHA-256: 57995dd7c640ee18582b4b0eec1e3e4d4672f9145df7131fca38fa147a0a58c8

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