Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd22aaf934b4d982…

MALICIOUS

PDF

46.5 KB Created: 2020-08-09 03:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1ed2c8a13da9f4a81a68e46176e5b0 SHA-1: e11a5c3bb487eda0a826e5aae4f347c47ff1b2a7 SHA-256: bd22aaf934b4d9823a260a2db352968e157b648c9b46094f88cf488530477139
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=caracol+africano+en+colombia+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of numerous other PDF links, identified as a link farm, further supports the malicious intent of driving traffic to external sites. No scripts were extracted from this sample.

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.cc/pify?keyword=caracol+africano+en+colombia+pdf
    • http://files.polarbands.com/uploads/1/3/0/7/130775432/6c252deb2.pdf
    • http://files.libertyartandframing.com/uploads/1/3/1/3/131384436/karonapepebiti.pdf
    • http://files.lifeenergypowers.com/uploads/1/3/0/7/130739895/6949354.pdf
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/11253149211.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/4778611063.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/86659227895.pdf
    • https://cdn.shopify.com/s/files/1/0450/8984/9509/files/jamb_biology_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/15797167167.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/xijofunodofowas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/12919095202.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/kexubagum.pdf
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/mepovizudama.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/jifadanof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/lekawukodino.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/pemetogewetuje.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_off000073d0.bin
bacd3af68468c92d90f3f28be50c08c77014bc081de7a5fff5e831720e3a5f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 5168 bytes
font_01_sfnt_off0000853f.bin
ef7af71f369d3458cb9a71e9229162ee37a7b4f931e367a75b2e87e0a7e87c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853F 11852 bytes

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