Malicious PDF — malware analysis report

Static analysis result for SHA-256 3135fc38d1bcd19d…

MALICIOUS

PDF

48.4 KB Created: 2020-08-07 02:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a28d41d8f643e785ba839ac2493a8977 SHA-1: a6d751fd7ad68192815ee2b6f869920f881ce3fc SHA-256: 3135fc38d1bcd19d57d009165472f8398dd841cdeaffc752b7ea3410a2f3f5af
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=analytical+questions+pdf+for+nts', which is also listed as a malicious redirector. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning effort to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=analytical+questions+pdf+for+nts
    • http://files.adamwilliamchalmers.com/uploads/1/3/1/4/131453645/zerodukegokide_zisif_xibusuroxolalov.pdf
    • http://files.ekilmp.com/uploads/1/3/2/6/132696210/gixurige.pdf
    • http://files.acfcrawford.com/uploads/1/3/1/0/131070317/kuledometit_mexet_polebebiraxupo.pdf
    • http://files.holyangelschurchri.org/uploads/1/3/1/4/131437531/komiwuxoxi.pdf
    • http://files.dfsplanroom.net/uploads/1/3/0/7/130740536/a2824d0cd17.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/sikutagifiruxajibubagitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/ffv_job_planning_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/apa_style_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/63835511804.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/article_226_and_227.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/fikiliginit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/60445186259.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/kumoxasusogumed.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/57042352127.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/analysis_of_financial_statements_of_a_company.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/vishnu_sahasranamam_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/zewivamudokitem.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/stanford_binet_intelligence_scale_5th_edition.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dd9.bin
feaba1c45e0a7ed2d7250068b2db44eb22f605c31033fb815bcdd0bd6d0ad6ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD9 5368 bytes
font_01_sfnt_off00009034.bin
89644dbbe963bb42b4280e60def9649aa8ce1fd2620c99a21e844d67794b2b91
pdf-font-stream PDF embedded font (sfnt) at offset 0x9034 10588 bytes