Malicious PDF — malware analysis report

Static analysis result for SHA-256 f248441b5ed49259…

MALICIOUS

PDF

47.1 KB Created: 2020-08-06 14:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764c7268f20143bf958a8c605dff0266 SHA-1: 3e5f21b8e6fd87e5623fac98086e257044744344 SHA-256: f248441b5ed492596bedaf32a7c9383897a8d1b30a5853efd32e46198d5bd4e0
120 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with many embedded URLs pointing to various Shopify domains and other sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=upkar+ugc+net+economics+book+pdf+download'. This suggests the document is designed to lure users into clicking malicious links under the guise of providing downloadable 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.com/pify?keyword=upkar+ugc+net+economics+book+pdf+download
    • http://vedifi.landscapeservicenassaucounty.com/uploads/1/3/0/7/130738837/9b63f476c.pdf
    • http://files.sprucestreetnyc.org/uploads/1/3/2/6/132695620/posasalugudup-mapip.pdf
    • http://files.bhumikafest.com/uploads/1/3/1/4/131454172/e0275.pdf
    • http://files.theskinstudioltd.com/uploads/1/3/0/9/130968984/6664465.pdf
    • http://files.historyspeaks.org/uploads/1/3/1/3/131379111/f13cb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7592/8215/files/pokan.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/87959049880.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/40394859070.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/ktm_350_sxf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/88872465023.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/76203367155.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/ciencia_natural_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/padaledivatazomoleri.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/holt_california_life_science_7th_grade_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/loposowuzakofatala.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_off000069ec.bin
f2767b219762200c099334d9b04e992ce2a86c7851ed086c9f0dcfc36187de55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EC 5760 bytes
font_01_sfnt_off00007d85.bin
db1d5391f67322c79a22c76c17113c7e8e316abd96cdd4f01f0cc0142a3baeb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 15256 bytes

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