Malicious PDF — malware analysis report

Static analysis result for SHA-256 711e200558df56a5…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 00:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748e9878bd5036027b292c96056b09dc SHA-1: cbd91d944542913a5d4c51b7171c87e4a5742ef6 SHA-256: 711e200558df56a54501dce00ee3ba51a37387f1aa0fb0dba9e3267e490a4618
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a link farm or phishing attempt. The document body text, though partially obfuscated, includes the target phrase 'anatomy and physiology of heart pdf download' and a URL that appears to be a lure for free content. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious sites or download further malware.

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=anatomy+and+physiology+of+heart+pdf+download
    • http://files.fishnfrolics.com/uploads/1/3/1/4/131406036/8408409.pdf
    • http://files.hansonfoodpantry.org/uploads/1/3/2/6/132681823/1b63725.pdf
    • http://bepifowu.jillhunteclecticart.com/uploads/1/3/1/4/131437657/156e80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/xifub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/wivizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/29633022224.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/daxogafuxolagux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/33421632897.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/sukid.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/67259163031.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/caracteristicas_del_enlace_metalico.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/computer_generated_voice.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/animal_genetics_and_evolution.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/63819757262.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_off00006685.bin
53207fc2ba4066dc26b3c846f2037161b5360ca05c9d6f79415bacfefd9e4519
pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 5640 bytes
font_01_sfnt_off000079a1.bin
bef6163688d8a426e7f9da1f7dfd9b8d74170923a4bfc78c2e82c103c7f66b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 10560 bytes