Malicious PDF — malware analysis report

Static analysis result for SHA-256 976bada19741f3bc…

MALICIOUS

PDF

33.3 KB Created: 2020-09-18 05:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdc809690c686fcf1c81b308259fdc44 SHA-1: aa77b451ca9a6b15487712a74a5c3b3b12ad1392 SHA-256: 976bada19741f3bc8e2ef041bbd36678c0967b6bccbbdc952365ed14d3c924b7
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting it is a lure for 'algebra 1 unit 3 assessment answers'. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, as flagged by PDF_SEO_LINK_FARM. These elements collectively suggest a phishing or scam attempt to redirect users to malicious content.

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.link/wix?keyword=algebra+1+unit+3+assessment+answers
    • http://wokafuron.totallylinkedin.com/uploads/1/3/1/3/131398455/wisepuzu.pdf
    • http://zomap.merrillscottagecountrylocksafe.ca/uploads/1/3/1/4/131406893/578aea5c.pdf
    • http://nimolo.barefoottofino.com/uploads/1/3/2/7/132741009/8569925.pdf
    • https://5b6c4d5b-2459-4050-b2e0-2c0640f72581.filesusr.com/ugd/9ea91e_1e0413915fcd463ca6b139f05c538862.pdf?index=true
    • https://b0472f14-6add-43cb-81b9-00c71d7a10bb.filesusr.com/ugd/dec231_48d2568b7327488391cc276e5d04c98c.pdf?index=true
    • https://8272bb1a-eb34-4ce0-85e6-598c8acb38ff.filesusr.com/ugd/154db6_ce69d9f4e63e42c58fe21242115c5e7e.pdf?index=true
    • https://66920ce0-8196-435c-aec8-c2334eea6887.filesusr.com/ugd/668a47_173732ef661f4c86be1b5d4563785578.pdf?index=true
    • https://128eeb5e-d757-4649-bdaf-2c2cb7d55503.filesusr.com/ugd/a86d68_66b720ff1bcc4c7f846b3b47166299b4.pdf?index=true
    • https://9ac558e1-ca7e-4205-bae9-e6b9480fe6bd.filesusr.com/ugd/1e8759_5736c45ab5e149e8b6e4435a01868886.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/suor_maria_crocifissa_della_concezione.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/43054796638.pdf
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/rurefijuzili.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044c8.bin
e2b9773143530c0bedb46975a0cd29119385431d599d92b4fb12c1b106cd4211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44C8 5444 bytes
font_01_sfnt_off0000574c.bin
94005590cf3427b756901df3d8fa3278309ac78254b0d79f998cc467a3eae4ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574C 9736 bytes

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