Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda8990d330ef621…

MALICIOUS

PDF

51.3 KB Created: 2020-08-08 09:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06567fd9ec8cb60220a5414ac96d761a SHA-1: b2a6fd45b0fed2db8ddc9a0e6c6109451b4f49b8 SHA-256: cda8990d330ef621ed016b771a377853dc5bdce251d50ade97a500901d1afa82
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=solving+quadratic+equations+by+using+the+quadratic+formula+worksheet+pdf', leads to known malicious infrastructure. The PDF also contains a link farm heuristic, suggesting a large number of outbound links, many of which point to Shopify domains. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=solving+quadratic+equations+by+using+the+quadratic+formula+worksheet+pdf
    • http://files.utbizreview.com/uploads/1/3/0/8/130874368/5731440.pdf
    • http://files.virsolas.com/uploads/1/3/1/3/131379099/fajop.pdf
    • http://files.sardisdoorway.com/uploads/1/3/1/1/131163737/zagapenez-wirigos-vamesim.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26450283228.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/wofenepusasosezaxubiru.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/anatomie__colorier.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/67983293224.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/pdf_strategic_marketing_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/kiwakumoduwiwexeri.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/rikamopujemaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/simple_swing_application.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/public_private_partnership_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/business_plan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/96922755098.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/
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/pdf_strategic_ma

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e6c.bin
f5201db981ae948ecc48339b133d6533f5745ef7060c9bb7d2468b114ee5dc35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6C 6256 bytes
font_01_sfnt_off000093a0.bin
93655eb6bf65e15b251358cea2465ded40d09eaf4202ba401941f4e3ada025ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 13976 bytes

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