Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98f295b5bfdf94e…

MALICIOUS

PDF

37.2 KB Created: 2020-08-03 12:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 747180701eed494b481917ecafda5411 SHA-1: 7c7cf66fc8d9b9cd92f64cb8f432510bf3e79668 SHA-256: b98f295b5bfdf94ed1e790a6c2941af2b63406a039c3b2ca9db3a9df1f1d7929
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which in turn points to a large number of PDFs hosted on Shopify. The primary malicious link is https://ttraff.cc/pify?keyword=keepers+of+the+kalachakra+pdf+free+download, which is presented as a free download for a book. This indicates a social engineering tactic to lure users into downloading potentially harmful content.

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=keepers+of+the+kalachakra+pdf+free+download
    • http://files.bigintimates.com/uploads/1/3/2/6/132695620/4807369.pdf
    • http://files.peydenshelton.com/uploads/1/3/0/8/130874110/21c333.pdf
    • http://files.torontotransplantinstitute.ca/uploads/1/3/1/4/131406498/jidujegapenawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/53701007605.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/4589301162.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/10748650999.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/81665890898.pdf
    • https://cdn.shopify.com/s/files/1/0439/3854/5819/files/46184696254.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/benidutibuno.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/97261079003.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/4394943820.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/70074949636.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/52020380841.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/gabep.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_off00005420.bin
53aa17d68d48ccd8b60fbab929f76dc77fc75b8e905c3520cfabac7ba5c5bb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5420 5368 bytes
font_01_sfnt_off00006666.bin
bc3e254ace35af80f36a1b834e0a7ec9549e95c73d6fce0df5c489bc30352252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6666 9796 bytes

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