Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b318c86c22beb66…

MALICIOUS

PDF

48.3 KB Created: 2020-08-08 13:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5237d0d090808d2a56a21cc231d3b228 SHA-1: 09d853ae8d55b5732432c60ecab0276f32edd55c SHA-256: 4b318c86c22beb6630bfe353c471ab092b2cf77cd6254c8c0ea9274d2f1d04c0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=integracion+biopsicosocial+del+ser+humano+pdf, which is flagged as a malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or traffic.

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=integracion+biopsicosocial+del+ser+humano+pdf
    • http://files.mrstutsmathclass.com/uploads/1/3/0/9/130968920/fogaro-bubejugu.pdf
    • http://files.centreoftheheart.com/uploads/1/3/2/3/132303134/ee7dcf2cd7.pdf
    • http://files.rikkiducornet.com/uploads/1/3/0/9/130969580/5414613.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/momentum_and_autocorrelation_in_stock_returns.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3941/files/sexodatadipomurukesut.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/wemagilosofitiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/2955618211.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/kegunasavuduxisix.pdf
    • https://cdn.shopify.com/s/files/1/0441/4128/1432/files/2001_jeep_cherokee_factory_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/68103548643.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/6248509002.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/ayurvedic_medicine_book_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/16557511654.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_off00007b70.bin
6e35edce8695c6a8204329fb9f3203461f388db3d6b782ceb9a755a7977db47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B70 5648 bytes
font_01_sfnt_off00008e74.bin
a6b9ed023c671524d14b0a407fd0b571a262bc1c3d51d3eaa6c276adeff1711f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E74 11112 bytes

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