Malicious PDF — malware analysis report

Static analysis result for SHA-256 424ff7fa836eec94…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 02:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7af04433f155ac91b1571fd75b3fe8a2 SHA-1: 6e8d69d513c721e452f9f0efaf330e7bfd90a011 SHA-256: 424ff7fa836eec94d2641586606ea99606094ebdca395976b65c31110f87da0c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=paulo+coelho+libros+pdf+gratis+veronika+decide+morir', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL and references to book downloads, indicating a social engineering lure to drive traffic to malicious infrastructure.

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.cc/pify?keyword=paulo+coelho+libros+pdf+gratis+veronika+decide+morir
    • http://files.d-93constructionupdates.com/uploads/1/3/0/9/130969151/xawagapopipuxa_kilefupi.pdf
    • http://zexop.threetreesart.com/uploads/1/3/2/8/132814930/difinamunedota.pdf
    • http://files.matthewmayes.net/uploads/1/3/0/7/130738765/fojatajor.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/nedejuladur.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/28657766720.pdf
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/jujejusuxavadox.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/parallels_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/sebolikurenijupuzeselu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/vufefosatukidimijoniku.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/76318790113.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/podelexa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9714/files/mupesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/vapomeri.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/58810016977.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/53945970798.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/voriwazikevamapaziru.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_off000063b0.bin
133d126fa4c408c58c2bc3334577f0c4d4033f8ff20246e8290d7ca44a014e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 5836 bytes
font_01_sfnt_off00007767.bin
e38813eec8d06fd75785bb5f3f6335e6fdc9b296775a3701c2200d6cb74e4f82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7767 10288 bytes

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