Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e031254ce496868…

MALICIOUS

PDF

54.6 KB Created: 2020-08-05 12:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a6f73b06d0ccba716e3575340eed09f SHA-1: c456709a28e24570e97b972039e0d8b2106689b5 SHA-256: 9e031254ce49686849a485999a9e1d0f54ddf53a349a10ed97ffb61f0496b726
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to disguise malicious content within a seemingly benign document.

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=yoga+asanas+postures+pdf
    • http://files.until-we-see.com/uploads/1/3/1/6/131637169/2199105.pdf
    • http://files.handorthopaedics.com/uploads/1/3/0/8/130813667/wakorowaxi.pdf
    • http://podoxig.stephanieruthkane.com/uploads/1/3/1/6/131637240/9051960.pdf
    • http://files.wmfhillinc.com/uploads/1/3/1/3/131383823/koxumanuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/convert_pptx_to_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/nejepolelodap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demotufilonameviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6466/files/tilokefukokepas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3109/files/financial_accounting_dyckman_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/46276494471.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3230/files/sogetonaxozitozonipelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/jurnal_tentang_biota_laut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/39608683153.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/pavivewigoguvafe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000878d.bin
e6a22aea4364453cf6bed5cc2cc4faa4300d4a312fd8bf5bd410db2c95c07c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878D 4972 bytes
font_01_sfnt_off0000987c.bin
01e50550cb307e7843464ed4dc55d242bf55441e57e28764e7df250bfad9f71a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x987C 12128 bytes
font_02_sfnt_off0000bf1e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1E 4324 bytes

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