Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e3f672c382438c…

MALICIOUS

PDF

51.5 KB Created: 2020-08-08 03:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eab764e4f120d7c214f2e4fb01a22a5 SHA-1: 6c5dfb22b51f97012396daaaa3c4c2ae8d9bc88e SHA-256: 87e3f672c382438c875a18888acfdea6486283a0fa90bebd79176265fa279ce5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to external resources. The primary redirector URL, https://ttraff.ru/pify?keyword=baixar+bncc+educa%25C3%25A7%25C3%25A3o+infantil+pdf, is flagged as malicious. This indicates a social engineering tactic to drive traffic to malicious infrastructure, likely for further exploitation or malware delivery.

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.ru/pify?keyword=baixar+bncc+educa%25C3%25A7%25C3%25A3o+infantil+pdf
    • http://files.bullittownersclub.com/uploads/1/3/1/4/131408245/0b0cd44.pdf
    • http://files.everlastinglovechurch.org/uploads/1/3/1/4/131437619/duporawojuw.pdf
    • http://xaxebikoj.vanessakeel.com/uploads/1/3/0/7/130739678/2905936.pdf
    • http://files.fifthavenuechristian.com/uploads/1/3/2/7/132710750/2420693.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/faradowasivotebuvomota.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/kabezimufopefinabegada.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/bonus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/buchungsbesttigung_hotel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/54210795539.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/nexesul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/classical_mechanics_taylor_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/4500/8039/files/cch_prosystem_fx_engagement_converter.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/10938756446.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/nufaxasasupewonudukuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/76385164513.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/faxexutomiwan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/fasuluzawo.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_off00008682.bin
1036ea17270367781c6dfe976f3219b32d6bb362c7fc22057459b84dba01a7d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8682 5728 bytes
font_01_sfnt_off00009931.bin
94f7dc7ba2b1a1050b1dbbbca6efdd4ca32d4b180346c45ed6c6d647efa4eae8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9931 12504 bytes