Malicious PDF — malware analysis report

Static analysis result for SHA-256 be263887a25e679b…

MALICIOUS

PDF

57.5 KB Created: 2020-08-05 03:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 931244f43601faa735e393c4ea633912 SHA-1: 7737e7c3c353357d8e4f7a43abe7292518ffc8d1 SHA-256: be263887a25e679bc3dfab0cfd4194c49861a36e534b2f77791c95a6d37dbc0f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=livestock+farming+in+zambia+pdf'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The file also exhibits characteristics of a link farm, with numerous external PDF links.

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=livestock+farming+in+zambia+pdf
    • http://mesiv.cicaclaim.com/uploads/1/3/1/8/131871699/fobiwula_zotob_vetonilod.pdf
    • http://files.sccasa.us/uploads/1/3/0/7/130775402/e0fd5a65aab797.pdf
    • http://files.tahl.org/uploads/1/3/1/3/131398250/xilupagofoteju-riguso.pdf
    • http://files.thestoryfront.com/uploads/1/3/1/3/131379290/3743008.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/49105778520.pdf
    • https://cdn.shopify.com/s/files/1/0440/6503/0309/files/vmmxx_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9522/files/nukes.pdf
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/c_programming_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/31946382439.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1873/files/nemunufipununudaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/samsung_sm_j327a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/teds_woodworking_package.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/lepobeje.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/primary_medical_certificate_application_form.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_off0000a1de.bin
4db644bbc2b520377e356546229b2902fe8d8d36503e5383fe89f9bc1280a664		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DE 5696 bytes
font_01_sfnt_off0000b542.bin
2de9cd9954185721b0dbf968c82d19f9fe9257f95af9fe471acf5db9e2f39814		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB542 10340 bytes

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