Malicious PDF — malware analysis report

Static analysis result for SHA-256 837c823a635d0e14…

MALICIOUS

PDF

38.2 KB Created: 2020-08-21 14:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 585b4beef09d2b794b5fe15813381f40 SHA-1: a1f37bb46a95a2535cc7537e90eab4ea7814e5d6 SHA-256: 837c823a635d0e147ef766e48d4d5337f0c0b81ded26268f5a9b3bf1cf7e7170
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=aihw+report+release+dates'. This URL is presented within the document body, disguised as a report release date, to entice users into clicking it. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious link likely serves as a lure to a secondary malicious payload or phishing page.

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=aihw+report+release+dates
    • http://files.vicegripgarage.com/uploads/1/3/1/6/131606087/a0923956bdea77.pdf
    • http://files.glendivesacredheart.com/uploads/1/3/2/3/132302759/3522120.pdf
    • http://porok.godinthetemplesofgovernment.com/uploads/1/3/0/7/130776791/tenepusebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/cement_mortar_cube_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0650/0769/files/como_usar_el_megohmetro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/rotomegasibekamanowolog.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/46714812216.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/dinamika_sejarah_asia_selatan.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/noxewezididixo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/battle_for_middle_earth_2_steam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/14483137464.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/challenging_calculus_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/guide_to_tcp_ip_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/27308708343.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_off00005647.bin
2296c18377e0002edd262733060fa64f69b4b162428b1d90a652bf6676fb3643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5647 5128 bytes
font_01_sfnt_off000067b6.bin
1f7cb020626c62533d59e659c59547a7b2a8f3b5bdd3e364db2d15a26cd71caa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 10636 bytes

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