Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea24cc70fc60f68…

MALICIOUS

PDF

33.4 KB Created: 2020-08-10 09:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 54b2d6cb285be11ae70b55552aa83414 SHA-1: 39962f47401a67037eb55ba44c3ec3855f375fc4 SHA-256: 4ea24cc70fc60f686c366b64bff89e90ef92d45b2df6f0de3a6d929aa1969c40
194 Risk Score

Malware Insights

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

The PDF contains a lure for guitar tab information, but embeds multiple links that lead to a redirector infrastructure. The primary malicious link is https://ttraff.cc/pify?keyword=black+dog+guitar+tab+pdf, which is known to point to malicious sites. The document also contains a large number of links to Shopify-hosted PDFs, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=black+dog+guitar+tab+pdf In PDF document text
    • http://files.gemalchemy.com/uploads/1/3/0/8/130813667/dogozinoziwik-pewim-nefovunesolin-betujiw.pdfIn PDF document text
    • http://files.liquidgoldbfs.com/uploads/1/3/0/9/130968933/rexopabe_ripawonagokal.pdfIn PDF document text
    • http://files.nicolebrauchart.com/uploads/1/3/2/7/132740580/39eb14.pdfIn PDF document text
    • http://files.dallas99s.org/uploads/1/3/2/3/132303238/7772865.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/1/0427/8996/1884/files/piwewikirazilet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/sadorateporizowagukimana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/introduction_to_sociology_of_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/88267086199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/rexedovopunivisuzobudumuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/life_expectancy_of_building_components.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/23052090423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/kutawafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/95487596061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/gefixaworufudegaxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/holistik_beslenme.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_off000047a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A4 5400 bytes
SHA-256: d5243002bb38b0b0ccd843f8ea189dd3dec5dbeaab317b6f66170c4cb6e642b6
font_01_sfnt_off00005a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A12 8924 bytes
SHA-256: 2d87b238a801f8ce36693b6db5a1c65b84557b202ff2d3b3da98568efa34a999

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