Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1820b8c33551a3b…

MALICIOUS

PDF

60.2 KB Created: 2020-08-08 04:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e218e158741f3a2fcf93f35826c3b589 SHA-1: eecdd2d9bf97276c5108f24e6d972d4d5aa7b524 SHA-256: f1820b8c33551a3b0d23b0c4e2c9e117ecbf61abd37d388e44ba48c6967f6494
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=contoh+makalah+agama+islam+pdf', is designed to redirect users to potentially harmful content. The PDF also features a large number of external links, many hosted on Shopify, suggesting an attempt to create a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier also flagged this PDF with high confidence.

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=contoh+makalah+agama+islam+pdf
    • http://files.liveatnine.com/uploads/1/3/0/8/130873737/mevigevozutototebin.pdf
    • http://files.wheelchairwandererlouellen.net/uploads/1/3/1/1/131164048/8407427.pdf
    • http://files.gardenguildlakechapala.com/uploads/1/3/1/1/131164572/1375705.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/ce-_200_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/29836155619.pdf
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/methods_and_applications_of_longitudinal_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/74883825195.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0752/files/45084710125.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/bunnies_and_burrows_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/95103603253.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/foforipasonutome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/xafaviwedutuxukokaxizozu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/benizotufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/72838026008.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b303.bin
99f636f848568c297a6dc1c645c10294359224089ce41a0dbbe5818347fe8300		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB303 19756 bytes
font_00_sfnt_off00007f33.bin
9c5cbd10eeaa28166808cdd5d6eb56a4af6fc09af78a9bffdf7e3af5530c8ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 5116 bytes
font_01_sfnt_off00009069.bin
0e58f70820fed0e0cb4b8e533ca05f57d6625c22315609df3159719120cb5008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9069 10076 bytes
font_03_sfnt_off0000d3ca.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 4324 bytes

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