Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b76ac48f2ebefad…

MALICIOUS

PDF

50.9 KB Created: 2020-08-10 14:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69bc235a74d2973d41f60747c94d7557 SHA-1: d1c504ccd5baab26bc960278630d09ed79e67569 SHA-256: 1b76ac48f2ebefadeb39c1f9639ba6759cc5f6d1d4fd430ab1c6d4e06d5a1157
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a resource about anarchism. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL which is also listed as an IOC. The PDF also contains a large number of external links, many of which point to shopify domains, suggesting a link farm or SEO poisoning tactic.

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=libros+sobre+el+anarquismo+pdf
    • http://ropel.orbitalhoops.com/uploads/1/3/0/8/130814328/bizisukoxotitosedesa.pdf
    • http://files.aminzargar.com/uploads/1/3/1/0/131070309/2709172.pdf
    • http://files.bouldermusicinstitute.com/uploads/1/3/1/8/131856945/binofenovebukidedin.pdf
    • http://files.mineralintelligencecapital.com/uploads/1/3/1/3/131398251/moletosazu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/aws_certification_solution_architect.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/82005508832.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/wugalid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/83738056966.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/87833581142.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/barclays_premier_travel_plus_pack.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/jotasofalotepow.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/oxford_picture_dictionary_3rd.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/28273009667.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/al_quran_free_download_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/60955031643.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_off0000869e.bin
1711a46f5d86ab5f2e996bceb94dbabf0b15e63178348f4a1feb369d9a6fd73e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 5396 bytes
font_01_sfnt_off000098cd.bin
55e1f823c86bf22fa4d1c4cb0969ac52143d2b280e0a99ec3e8b4d205233d72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CD 11088 bytes

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