Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a9fd50697c5bf6…

MALICIOUS

PDF

37.3 KB Created: 2020-08-31 13:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a703ac33a881b8377ba06dc86f4d4b9a SHA-1: cbca17a1ef20e51ce17da81aacc2c86c6fc579ac SHA-256: 21a9fd50697c5bf600c767c3870e36ab8376658c20665b28fbc91159c48f9e65
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Cisco catalyst 9500 admin guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content.

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=cisco+catalyst+9500+admin+guide
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/mitadejorupiwurip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1442/1653/files/change_to_word_doc.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/cover_letter_template_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/6979205762.pdf
    • https://static.usrfiles.com/ugd/3be3a7_3de341282d4e446398a5ad95c5681c11.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/tuzesuvonefetevivufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/80040373049.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/fanejiwodusugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/canvas_model_template.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_off00005374.bin
59c6b53c698844d923263b3811269b908d92a40ad392ffc0169ef9ac7dad1013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5374 5592 bytes
font_01_sfnt_off00006673.bin
16d417242e261894b6d7e95bd34be6d33781594b2f0870e84895d3771ec2e571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 10084 bytes

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