Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7cc658cd2edaec…

MALICIOUS

PDF

34.0 KB Created: 2020-08-19 09:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 897be1c7501c0f2170da47e4676c98b1 SHA-1: 098472bb1598420b5b4b47fa035cc62c5b393508 SHA-256: 1c7cc658cd2edaec625c0dec44f5afe1afc2b7831bc365872b29a6009a411ced
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, specifically "Neonatal resuscitation course test answers". The primary link, https://ttraff.ru/pify?keyword=neonatal+resuscitation+course+test+answers, is a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links to PDF files hosted on various domains, including Shopify, indicates a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted from this sample.

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=neonatal+resuscitation+course+test+answers
    • http://files.voiceofourangels.com/uploads/1/3/1/3/131379860/61cb48de35d8.pdf
    • http://files.pamelagossett.com/uploads/1/3/0/7/130776757/1591499.pdf
    • http://files.thedomainhobart.com/uploads/1/3/2/6/132681611/lisodakuxixasaruw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/96294551088.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/64535741766.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakawefefaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/dymo_labelwriter_400_turbo.pdf
    • https://cdn.shopify.com/s/files/1/0450/2922/8702/files/79025232427.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/woxufopagutukol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/angularjs_reader.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/zalawamubefolavanunewa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/51338466442.pdf
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/jonabitozoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/75457822057.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/24912055435.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/xodidut.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_off00004743.bin
8cdf401a49534d573a6e70cc07f529575761aad2790bee6aae1603f1522910ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 4856 bytes
font_01_sfnt_off000057e3.bin
ba2c0d9b95d3a17b10113a0c8c156d0b4c43ec0a725611bc43ec6549e672d37c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E3 10204 bytes

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