Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa0889a54b27d92…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 10:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 716875c37b22bb60ccc28e9a32cdb753 SHA-1: 8fef2ec1d1c2cdab999c0aa3051a34d7b8511c79 SHA-256: 2fa0889a54b27d9282ba17efd85444323090014adfd932e0ac91f717b986e2ee
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a calculus textbook download and the malicious URL. This suggests a social engineering attack aiming to trick users into downloading further malicious content or visiting compromised sites. No scripts were extracted from this sample.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=calculus+early+transcendental+functions+4th+edition+pdf+free+download
    • http://domedeni.justacatlover.com/uploads/1/3/1/3/131380600/fegiw.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/77195482858.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/17788906437.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/27548303207.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/botany_notes_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/10502397721.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/nirugaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/seismic_data_analysis_yilmaz_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/pasar_documento_de_pdf_a_word_gratis_en_linea.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/rimuvolimafeke.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_off000064db.bin
d5207aa1888817d7cd03d7c0e31da7263fb8c97e6ce2d5642ea9eff0c5be88a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 5428 bytes
font_01_sfnt_off00007764.bin
953d52536e5bb72964059e03fa95f3a2974dac0115367ac09bdec5258728d898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 10556 bytes

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