Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dbff7b5911df07…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 15:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05607e210ceb7fbeb3d50728b8031cca SHA-1: ae0deffc22431022104e104073a45ceffe20961f SHA-256: f6dbff7b5911df071470efe8d9fac867d3d3b918996efdf0334bc7644aeb732e
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'pdf to excel converter' and the malicious URL, suggesting a lure to download or access malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple embedded URLs pointing to potentially malicious domains is a strong indicator of a malicious campaign.

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.com/wb?keyword=pdf%20to%20excel%202007%20converter%20free%20download
    • http://tosupawa.whiteswanfilms.com/uploads/1/3/1/6/131637814/ea121fd393cfa.pdf
    • http://files.mayflowerimporters.com/uploads/1/3/1/4/131406605/gibepulidof.pdf
    • http://files.glenoakchurch.org/uploads/1/3/1/8/131856860/jemepatol_mulekemibibalin_vipeni_kajenav.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/shawn_mendes_senorita_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/nuparulowawofadiboze.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/6610086839.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/41718794359.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/back_pain_exercises_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/27072735921.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/54591776944.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/60078887369.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/capitalization_and_punctuation_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/pekobulisegovomesabune.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_off00006187.bin
bb488bcc9242c237530f884ffd992e8c1ab216f4f3efd487a0ed2ad75663e903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6187 5412 bytes
font_01_sfnt_off0000741d.bin
6cd8b4ed760277329bc6acb886ed7a127167dbf2aca59a2073eadf622c9e02c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 10192 bytes

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