Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a62ced661664cf…

MALICIOUS

PDF

34.9 KB Created: 2020-08-08 11:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6443c6047bcd2687a9893d8841ac50e SHA-1: b3c9679bdb4d8a23b7863ebdbc6588868e1526d2 SHA-256: 05a62ced661664cfa9a363ef3a623d4147e55bbd0486d28d7f86d1bb9fa8c77a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to a 'songbook PDF'. The primary malicious URL identified is https://ttraff.com/pify?keyword=green+day+american+idiot+songbook+pdf, which is likely used to redirect users to a malicious site or download further malware. No scripts were extracted, but the presence of malicious links strongly suggests a phishing or malware distribution attempt.

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.com/pify?keyword=green+day+american+idiot+songbook+pdf
    • http://files.markmorelli.net/uploads/1/3/2/8/132815365/jotojotojidokus-siluvozasu.pdf
    • http://buzudefu.littlesilverems.com/uploads/1/3/1/4/131452977/ec1d8c3ad930f95.pdf
    • http://files.ktoart.com/uploads/1/3/1/3/131379877/befixigaxinuwiv_rulazejiraxipo_xifolexorirep.pdf
    • http://files.greecepaint.com/uploads/1/3/2/8/132814136/1871782.pdf
    • http://files.heartlandhospicemj.com/uploads/1/3/1/6/131636664/burov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/gigawezuruvixiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/balarama_mayavi_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/national_sports_awards_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/assembly_language_step_by_step_programming_with_dos_and_linux.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/base64_string_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/dunizagiluvoropatuwagabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/sixuviwekuwune.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/71356696028.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/intraday_swing_trading_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/casio_f_91w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/wavegofaxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/cellule_vgtale.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/65398462526.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/64080466768.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004777.bin
9f5a877a8a0a6b91e37e74f310568ea5498dfc9d2257167322538d5e97a6b68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4777 5780 bytes
font_01_sfnt_off00005b1d.bin
3a869f144559dd03ea52d940e83e5ad52ed868d808ab4c590c546e9ba45bdecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1D 9788 bytes

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