Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4751a4484d4a2d…

MALICIOUS

PDF

55.4 KB Created: 2020-09-18 14:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94c7d60e6ad216db7e2d8cef6088f8c5 SHA-1: d26f20a70ed7eaf8f460211f4e87c43fccb08e97 SHA-256: 5e4751a4484d4a2db44934996b146ed8b2878b243d912533c515d480624618f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links pointing to various PDF files hosted on external domains, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a malicious intent to redirect users to harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded URLs strongly suggest a malicious document designed to lead users to potentially compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=empire+of+storms+pdf+wordpress
    • http://vedatik.momagictrophyhunts.com/uploads/1/3/1/4/131453723/3102266.pdf
    • http://files.k2story.com/uploads/1/3/1/8/131856476/negut.pdf
    • http://wujemuda.strawberryflats.com/uploads/1/3/1/4/131483281/2834426.pdf
    • http://negus.normcrouchphotography.com/uploads/1/3/1/3/131379875/771f6a2b7ee6.pdf
    • http://files.koahspearguns.com/uploads/1/3/0/8/130813849/worabugesezu_fowipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://99c6f765-dbb0-4dd9-bb66-4bbc49d74c12.filesusr.com/ugd/067ecb_91e00a4c70f84b189b0ca12ce7bd635e.pdf?index=true
    • https://2d33153d-7901-4525-9869-43e22f769d76.filesusr.com/ugd/79cb75_79e622246ecf485f93db314d2ded53eb.pdf?index=true
    • https://c6b7d96c-4bbc-48d7-837e-04d2d757bedb.filesusr.com/ugd/1b0481_00756debc89e4435ad66773442375452.pdf?index=true
    • https://ebe625db-a804-4b12-8643-ee32bfcb34ab.filesusr.com/ugd/197ed4_6c46a7122b604e4e95994d1509578431.pdf?index=true
    • https://48164307-e380-4006-b730-421dfe42a9c5.filesusr.com/ugd/682d1c_f6881500619744d288ad69a10f110c2b.pdf?index=true
    • https://cf2beb9b-2d83-4e1a-bc33-a5e65a185e3f.filesusr.com/ugd/154db6_e1b81d3291bd46a18b7935363dee4256.pdf?index=true
    • https://f97bd6a7-3527-44f5-9c58-7178f84038f8.filesusr.com/ugd/d99ef3_a0b3643681854091b8420294a8a66e43.pdf?index=true
    • https://c50fa798-2999-40db-bea2-493d92a15fff.filesusr.com/ugd/c2bf0a_963e59c6006c42b6bc3b6de13e1e6096.pdf?index=true
    • https://3c74de51-d27b-4d77-a18e-79e25f9f4a86.filesusr.com/ugd/3225da_dffc06e9a7c14677b601d924c6d8033e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0460/1472/6311/files/jinokagafutikis.pdf
    • https://cdn.shopify.com/s/files/1/0459/5620/2655/files/bogabasusivuvaxug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/57637409141.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/d_d_5e_charm_person.pdf
    • https://cdn.shopify.com/s/files/1/0480/9388/8676/files/19928820676.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007995.bin
fe1f8e0a45a8b0e329c1bd8cff21f21a1b15aea57933e17f4480d6caf0ad1215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 4676 bytes
font_01_sfnt_off0000898b.bin
b2efb88767799ef7e97294332ab560e59782703ef2ca4b7aabedfa8d1460ae97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898B 10352 bytes
font_02_sfnt_off0000ad27.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD27 16164 bytes
font_03_sfnt_off0000c220.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC220 4324 bytes

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