Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba049bbd2739d6f…

MALICIOUS

PDF

40.2 KB Created: 2020-07-09 01:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 504738a717734ab5da3e931ff921993e SHA-1: e24bb79e3187b24bd02411016c254e1b8359ce06 SHA-256: 4ba049bbd2739d6f43c6e00cf6c0880aba431625f9a37c57f8633c4bc85c1b8c
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which point to PDF files hosted on various domains. One prominent link, disguised as a free download, redirects to a known malicious infrastructure. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious sites or downloads.

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/wb?keyword=vocabulary%20worksheet%20factory%20free%20download
    • http://files.rcoeliohub.com/uploads/1/3/1/8/131858747/ferapikudoj.pdf
    • http://files.coastaldeliinc.com/uploads/1/3/1/6/131636972/sajozazeroxuvavuw.pdf
    • http://files.rachellynes.co.uk/uploads/1/3/0/7/130775368/c863d9adf2.pdf
    • http://files.shrinkysheets.com/uploads/1/3/0/7/130775368/7477015.pdf
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.pdf
    • http://files.angeldreamsquiltshop.com/uploads/1/3/2/6/132695332/remipupewij.pdf
    • http://files.thamesvalleyquiltersguild.com/uploads/1/3/2/7/132740501/8517892.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • http://files.unidadepastoral.com/uploads/1/3/1/4/131437351/195585ef.pdf
    • https://ketosofugu.files.wordpress.com/2020/06/tokusuwemomoraminipel.pdf
    • https://vanaligu.files.wordpress.com/2020/07/96998971323.pdf
    • https://divosurepewa.files.wordpress.com/2020/07/42619706159.pdf
    • https://jexoxaluk.files.wordpress.com/2020/06/pedid.pdf
    • https://xofosawe.files.wordpress.com/2020/07/lenorudebebosidara.pdf
    • https://vovojekuvi.files.wordpress.com/2020/07/55313777512.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.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_off00005e7a.bin
bdee5c5cf95f3a18fba9bdd1e2a4b4a417c47dea87dd9a36ea589c3f758f9cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7A 5308 bytes
font_01_sfnt_off00007086.bin
be40a21f58350e9bdf140c4df084ec1b04ea620f11602150a9b2518c932434fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 10288 bytes

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