Malicious PDF — malware analysis report

Static analysis result for SHA-256 948ce4aa9569486e…

MALICIOUS

PDF

61.8 KB Created: 2020-09-05 01:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a738f79905ec61c9daf35a1f905245f SHA-1: e2fa4c5f0951734150c9e5d05109fae4264b017e SHA-256: 948ce4aa9569486e989aaeee404cbc7e2a6cd24132efb1ac559e7f4b9d6a335b
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'Administração direta e indireta para concursos pdf' and the malicious URL. This suggests a phishing or scam attempt to redirect users to potentially harmful content. No scripts were extracted, and the primary malicious activity observed is the redirection via the embedded URL.

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.club/wix?keyword=administra%25C3%25A7%25C3%25A3o+direta+e+indireta+para+concursos+pdf
    • https://static.usrfiles.com/ugd/b8c837_fff7a2b6cdc04b4a86919b16fa7089a6.pdf
    • https://static.usrfiles.com/ugd/5ecadc_6bf23d918e0b497c88f9cc0557d58aaa.pdf
    • https://static.usrfiles.com/ugd/576447_e41a26735998417aa50e986a5c27634b.pdf
    • https://static.usrfiles.com/ugd/9df9d6_4775d3f13136476189f8d3dc83f40f08.pdf
    • https://static.usrfiles.com/ugd/ab0441_001461c3515d47eca48c096630632acf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/katangian_ng_retorika.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/5031421870.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/panchatantra_kannada_stories.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/xarelevapubijuletinoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/asme_b31_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6323/0116/files/morgana_support_runes.pdf
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/18729552413.pdf
    • https://static.usrfiles.com/ugd/69695d_8960beff14fb4d528861148caae060be.pdf
    • https://static.usrfiles.com/ugd/9117e0_e4010c111f4f4716b6a2dadf4e5f95d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd84fc258d5d444e9dab9b890d882d12.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ab38440706a40fbb0be0d4e8ba6110b.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
font_00_sfnt_off0000874d.bin
8a9542470c11e0adb23eb82fd9007b0e96e5660845a2fae361a137ef5f34fc0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x874D 5640 bytes
font_01_sfnt_off0000997a.bin
b77333aec8b422add22297f3af60bf9013e9766068e9b2f7fac617032fd0f62b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x997A 13684 bytes
font_02_sfnt_off0000c354.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC354 16312 bytes
font_03_sfnt_off0000d8df.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 4324 bytes

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