Malicious PDF — malware analysis report

Static analysis result for SHA-256 e331ee47ef9663f8…

MALICIOUS

PDF

44.0 KB Created: 2020-08-12 12:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec21aeffaff4543dd23d4813bc2c0c1 SHA-1: ba8c9efcde60c613a557960dfe5e3a29962d135c SHA-256: e331ee47ef9663f869bc533230c0eb1d2766d56f23397ae7a4f10492213de0b9
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=bioremediation+of+soil+and+water+pdf, which is likely intended to lure the user into downloading further malware. The document body itself contains garbled text and references to 'wkhtmltopdf', suggesting it was programmatically generated to host these links.

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=bioremediation+of+soil+and+water+pdf
    • http://files.windycityknittingguild.com/uploads/1/3/2/7/132712323/450507.pdf
    • http://files.netarrant.org/uploads/1/3/1/0/131070866/daa1ab208997.pdf
    • http://files.himburgelectronics.com/uploads/1/3/1/6/131636602/6768463.pdf
    • http://files.jennypegg.com/uploads/1/3/0/9/130968920/foderu-gorufixojav-funaxewiko.pdf
    • http://files.maxluxeminklashes.com/uploads/1/3/2/3/132302963/wagevosobebo_zuraboxez_fafages_modoguk.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/godafebejuxopupifas.pdf
    • https://cdn.shopify.com/s/files/1/0441/3816/8472/files/57840340995.pdf
    • https://cdn.shopify.com/s/files/1/0450/8804/7256/files/university_calculus_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/atresia_biliar.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/75151098579.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/functions_of_managerial_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/multiplication_and_division_worksheets_year_4.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/miwapejit.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/roman_catholic_mass_in_tamil.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_off00006de8.bin
1474690c92f655ac647e6477325b65894585de6c91e475432986036268845f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE8 5328 bytes
font_01_sfnt_off00008002.bin
0f6125904555aa08b8eef189ae4ccc8755d3522d1dcb6f8f49a71d49602eba94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 10376 bytes

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