Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d6bd60f3f0f52b…

MALICIOUS

PDF

46.7 KB Created: 2020-08-14 12:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c22161fbde2541916e48b448cd861fd5 SHA-1: 98b1b56699e04fb204e19f8a3cdd75f2becce4c5 SHA-256: 83d6bd60f3f0f52b91f2d6fc5f0d5257a3a6ec47a9b47f55d7a0cf9e32a6f2d0
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body is obfuscated but contains a reference to a 'California king snake feeding guide', likely a lure. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt 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.ru/pify?keyword=california+king+snake+feeding+guide
    • http://files.somalibantucitizengroupoforegon.org/uploads/1/3/0/7/130740517/vedovibifewadi.pdf
    • http://bizopibel.dralicefung.com/uploads/1/3/0/7/130775203/e123d3fdb3b0.pdf
    • http://files.dreamcarmediaevents.com/uploads/1/3/1/8/131871687/1a4e63d4.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/zonutuboxeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/98091167212.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0160/files/airasia_route_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/tinkle_magazine_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/vawadofabibexixovamupel.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/86320372774.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/microbiology_laboratory_theory_and_application.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/jijosujidubinulalese.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lokilus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9477/files/bihar_daroga_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/rafirurop.pdf
    • https://cdn.shopify.com/s/files/1/0440/6771/7270/files/vermilion_parish_jades_system.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_off000079db.bin
5861220c73de6fbd87b1b03076b8b741fa24d43b5f608433a5d78e6181f9b0cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DB 5044 bytes
font_01_sfnt_off00008b0f.bin
a08622cffb20df50eee7d8af997584182ccd523a11c1e66a26135b34d9c52955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0F 10244 bytes

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