Malicious PDF — malware analysis report

Static analysis result for SHA-256 752786fe1aff6254…

MALICIOUS

PDF

39.8 KB Created: 2020-08-16 19:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06384fd977c0c1e72bcb9384fb5ffa6 SHA-1: aab0fa6ed95f417296d8ae22623b039ab1f096eb SHA-256: 752786fe1aff6254afe7d42c08815992bf1476a9fa11cec16c0a26d508105c99
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a song lyrics video, likely intended to trick users into clicking the malicious link. The presence of multiple PDF links suggests a link farm or SEO poisoning 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.cc/pify?keyword=can%2527+t+stop+the+feeling+lyrics+video
    • http://siwosuva.sunnydayspreschool.net/uploads/1/3/2/7/132712050/pumobip.pdf
    • http://files.luminosityskintherapy.com/uploads/1/3/0/7/130739557/96b6e7fa8c803b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/39652264472.pdf
    • https://cdn.shopify.com/s/files/1/0439/6492/4062/files/ditoxoviwurofaxixagizimik.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/22462759262.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/49942642212.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/puntos_de_partida_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/anaemia_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/advertising_effectiveness_project_report.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_off00005e51.bin
2e6552c8c6a70d97b176696a89d39aa4f0deb38be47d335e2b4b126ed1e9f587
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 5520 bytes
font_01_sfnt_off00007126.bin
87c24982a23938ab220c9e891e566b7753777fe6ae36ae7e1b07cf1dd5378cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7126 9700 bytes