Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e439fad837c9c3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 06:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 622e689e725a89a63991cac9698fd17b SHA-1: 7016a7828c50f8f5d42d874400bc6de9877ebae6 SHA-256: e0e439fad837c9c33d467ab21347da40a2b44787acbc02f145a87e59d248ef71
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a link farm, embedding numerous external links, many of which are to Shopify. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF filenames, suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting the user to a malicious site.

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/pify?keyword=bakal%25C3%25A1%25C5%2599sk%25C3%25A1+pr%25C3%25A1ce+upol+pdf+vzor
    • http://files.tropicsailing.com/uploads/1/3/1/3/131398360/bagapitebir-dodarawavejapu-pomexajoxow-jefanapurorukum.pdf
    • http://files.vomorenburg.com/uploads/1/3/1/1/131164431/5580987.pdf
    • http://jisofoj.gianmarcodaniele.com/uploads/1/3/1/0/131070487/zekutadi.pdf
    • https://cdn.shopify.com/s/files/1/0449/6883/7288/files/supply_chain_management_powerpoint_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/manual_juego_agricola.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/calendario_2019_excel_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofexunixepufatomubudabak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/understanding_pathophysiology_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0462/0088/1315/files/57431766157.pdf
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/3_storey_building_floor_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/bosifipiremuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/952321562.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/indoplay_capsa_susun_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/nered.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_off00006886.bin
b9d6a7bc27d7717ebac25ff03297a9cce58ff33a70a1d1209970b1110df52960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6886 5732 bytes
font_01_sfnt_off00007b68.bin
e5b0a2baf53cec2b5bd0e6cb6de34cdd7df391013bb82b95ce7fb5371ff6de46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 11812 bytes

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