Malicious PDF — malware analysis report

Static analysis result for SHA-256 9930b707f90870b6…

MALICIOUS

PDF

33.8 KB Created: 2020-08-17 05:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bbca57e0627146cd6f6311b50fc41b5 SHA-1: 13a126c6388ea0a915373680b7059bf93bfa4754 SHA-256: 9930b707f90870b62a266f2581df351c941834d4c7886af5996ae5948b1135c6
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.ru/pify?keyword=factoring+quadratics+algebra+1+worksheet'. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on Shopify, likely as a lure. The presence of numerous external links and a malicious redirector strongly indicates a phishing or redirection attack.

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=factoring+quadratics+algebra+1+worksheet
    • http://files.msjohnsonscienceclass.com/uploads/1/3/1/8/131871484/kezezubuxeb_nelodutudonesav_jediwotamumigu_nodoge.pdf
    • http://files.misadaitg.com/uploads/1/3/2/6/132695569/wogemiganozurubu.pdf
    • http://tibigizo.whittykitty.com/uploads/1/3/0/7/130775540/bodovatobebim.pdf
    • http://files.madebymitchell.com/uploads/1/3/1/4/131437091/5143135.pdf
    • http://files.jimpendergrass.com/uploads/1/3/2/8/132815961/xabixejeje-nenowapiwage-jisematonalon.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/declaracion_de_alma_ata_1978.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/exercicios_associao_de_resistores_mista.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/jifijadadogurir.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6921/files/95714155066.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/47606831008.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/64871428506.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/kifeju.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/gurakasututugavomemole.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_off00004782.bin
fd8ae16d18da41cf3645c79061e77e6a0fa107e4470f2e9dfffbd27786ba558d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4782 5628 bytes
font_01_sfnt_off00005aa7.bin
fec2b859fca1eb7bda6a404f25b169ce923c465fb7c1801414acf518c1bbafb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA7 9324 bytes

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