Malicious PDF — malware analysis report

Static analysis result for SHA-256 5523ffc9d66b87f8…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 20:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48679fe1c04fe4fc19a84037362219c0 SHA-1: 1e8909da5842d663a7e2e4d8aa259b93261ee493 SHA-256: 5523ffc9d66b87f89c0360fd83960358a7b7e580995a5de48fba372470a01d47
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/pify?keyword=golden+cydia+apk', which is also flagged as a malicious redirector. The presence of numerous links suggests a link farm or phishing attempt designed to lead users to malicious sites.

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=golden+cydia+apk
    • http://sadubo.johnmindeman.com/uploads/1/3/1/4/131482952/e0ed99951.pdf
    • http://files.healingwithhorsesranch.org/uploads/1/3/1/4/131437669/kivumebofarilax-safawe-fiteva.pdf
    • http://loxabaku.kmoranart.com/uploads/1/3/0/7/130775883/pezesevu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/5609707566.pdf
    • https://cdn.shopify.com/s/files/1/0461/4334/0697/files/82907587530.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/epidemiologia_clinica_fletcher_5ta_edicion_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/lapakasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8423/files/sirodamofepuzovize.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/xagekimurodurubuxuruwegu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/39272159094.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/vodasomibesedotiwap.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/gutima.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/87604233389.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/phytoremediation_technology_for_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0438/1612/4576/files/vejodusimirejugi.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_off000061d4.bin
c420fafe15c3494d814cc806558315c0b5acca0ec0caffe3204dcc2bcc4db61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 4988 bytes
font_01_sfnt_off000072f2.bin
9f9ff608247a810d0c8ce8f591b8eb4a594c9c9719a22f500cb5a85c497a8714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 10012 bytes

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