Malicious PDF — malware analysis report

Static analysis result for SHA-256 6066f45cfe2be258…

MALICIOUS

PDF

45.6 KB Created: 2020-08-12 13:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ae70d9ed0f4b0f68ac6f62a46c62ae SHA-1: 1e1b4e03bdfad3a9368c9fee1639087e7311a696 SHA-256: 6066f45cfe2be258324e6d7f808360aeb10c78269da45ba5156c875f36c5e3d5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate PDF resources but redirect to a known malicious URL. This technique is commonly used to distribute malware or phish for credentials. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms this assessment.

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.cc/pify?keyword=astm+a106+a106m+pdf
    • http://files.ethnictails.com/uploads/1/3/0/7/130775859/bilisudufojipe-sapawununamiw-tatawuzodij-jixid.pdf
    • http://files.armakansas.org/uploads/1/3/2/3/132302926/butilirod.pdf
    • http://files.kincoastphysio.com/uploads/1/3/1/6/131636843/samumelogogedalo.pdf
    • http://files.carnarvonraceclub.com/uploads/1/3/1/6/131636644/b46a5c8449e9.pdf
    • http://wipetazu.replicate3d.co.uk/uploads/1/3/1/4/131438216/367cbca161.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/1161/0536/files/toketorup.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/44049444069.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/vasefemoritufasixutifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3150/2749/files/35108895685.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/xupodepiriw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/fivuxinewevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/56457602043.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/makalah_askep_bronkopneumonia_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/garujagefugilofaso.pdf
    • https://cdn.shopify.com/s/files/1/0438/7035/5611/files/monosacaridos_y_sus_derivados.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/dafuzalogarojirukadajen.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c9.bin
36479b794e86af5c5a21f5c7773d35860843a9ac874d4f1774af97fc3ebc33d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 4800 bytes
font_01_sfnt_off0000740a.bin
09a86c0f4ce4f8553faa870e7b8cdfa591ec663c569367f47358d572dcbcc9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740A 13464 bytes
font_02_sfnt_off00009ba5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA5 4324 bytes

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