Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b8cc50a52c353f…

MALICIOUS

PDF

47.2 KB Created: 2020-08-28 01:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c336ded419ac8032c174dbb7a44fa60 SHA-1: 70ab320057ad293ec08cb13ad07b23ce52c71bd0 SHA-256: 40b8cc50a52c353f60f1acc64b7185bdb3569f49e9da1c4948a1c71db5a9ddd2
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. One URL, 'https://ttraff.ru/pify?keyword=perfil+del+paciente+hospitalario', is identified as a known malicious redirector. The presence of these links suggests an attempt to manipulate search engine results or redirect users to malicious content, rather than delivering a direct payload within the PDF itself.

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=perfil+del+paciente+hospitalario
    • http://wumusugel.spotlightseniorservicestucson.com/uploads/1/3/0/7/130740019/741584.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/84614207376.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/gejodeganefete.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/sajuserororili.pdf
    • https://cdn.shopify.com/s/files/1/0462/5789/7623/files/22005555335.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/tinileluxuwafiguvagipuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/nifivejawupelitokom.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/xafesavuraravo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/zuvasisikolexopaxone.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/airport_utility_apk_for_android.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/
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/xafesavurarav

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077bc.bin
7b0d59acfc91d8ac3eedcd9d118ae915075316a1c21cc16b560736ee137be774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 5244 bytes
font_01_sfnt_off0000897b.bin
2b7d35501b61a16094eac524b2531568acdaf158bd5fbd1c8d8d806c1dc13e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897B 11428 bytes

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