Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae090097efe4ce0…

MALICIOUS

PDF

36.7 KB Created: 2020-08-11 19:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdad15d73ece7b3b6433c12290d21c8e SHA-1: 136f5a28ab9e2d432e92dcf74bf782cd3c626312 SHA-256: eae090097efe4ce00299e221db4230887d204921aa7c4a308f70baae6cf10048
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Achievers b1 workbook answers pdf' and the malicious URL, indicating a lure to download or access potentially harmful content. No scripts were extracted, but the presence of multiple PDF links and a malicious redirector strongly suggests a phishing or malware distribution attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=achievers+b1+workbook+answers+pdf
    • http://files.brosforstevenash.com/uploads/1/3/2/3/132302992/856a997.pdf
    • http://linubo.jsptacek.com/uploads/1/3/0/8/130814328/sagurileki-malabunopubegen-jozaruluzedob.pdf
    • http://files.femmebricoleuseofoakdale.com/uploads/1/3/1/8/131871850/1882454.pdf
    • http://files.pizzatimewestbrook.com/uploads/1/3/0/8/130874594/pukoxuwekiputul.pdf
    • http://files.akpartnership.org/uploads/1/3/0/8/130874474/wigud.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/diccionario_biblico_cristiano_reina_valera_1960.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/fejobesediriri.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/vinebuxadatavosebegamu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/32286963389.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/baruxuguvun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/28995560253.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/didorevewener.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/solovukewuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/0663/9779/files/1953014267.pdf
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/4370713758.pdf
    • https://cdn.shopify.com/s/files/1/0441/3489/1672/files/psd2_rts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044d0.bin
9c46c73bf046ab268cd6ebd2c31af18df729dc303ce86eeddbcbf1b5aec21111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44D0 5316 bytes
font_01_sfnt_off000056db.bin
c3335aef3d8aafbfdf79a20bf94b0480fb285179ebef6cf16f7b50cdbbfdf416		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56DB 9640 bytes
font_02_sfnt_off000077d5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D5 4324 bytes

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