Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8319f48cb83815d…

MALICIOUS

PDF

49.3 KB Created: 2020-08-12 21:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93854b321b30af82491418997b108aa2 SHA-1: a40bbbd61e2d64895900fd6b42acde0942ed1e45 SHA-256: a8319f48cb83815d2625b62e55dec17ba5d37a1737dba9296dcdd913a3d28e3f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=capital+budgeting+problems+and+solutions+pdf', which is likely intended to redirect the user to malicious content. The presence of numerous Shopify-hosted PDF links suggests an attempt to leverage SEO for distribution.

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.com/pify?keyword=capital+budgeting+problems+and+solutions+pdf
    • http://povavuwuk.botlmovie.com/uploads/1/3/2/8/132815176/fe0378500e9d2a.pdf
    • http://files.explorationsinteractive.com/uploads/1/3/2/6/132681647/74355d9a002ae.pdf
    • http://files.paymyrent5.com/uploads/1/3/1/6/131606056/810a24b6766a50.pdf
    • http://files.solonvotes.org/uploads/1/3/1/8/131871643/kigis-nuzudugub-suvemakum-tixikifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/xufemuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/cambio_climatico.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/fotogasilupegebosigote.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/jisesigudajukerepojo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/89706100392.pdf
    • https://cdn.shopify.com/s/files/1/0440/6181/9045/files/84277833066.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/ne_yo_addicted.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/1484629412.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/minecraft_0._13._0_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/32123538919.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ef.bin
b507ceebc4625053f373eb96a807f885dbbdf2fa9bb4a7dbfb313d9b0be19653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 5404 bytes
font_01_sfnt_off00008628.bin
d0b1c32dfedf1b35fb6313a77059a8c76cfb775905c181ad388d9504bd4645b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 10296 bytes
font_02_sfnt_off0000a968.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA968 4324 bytes

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