Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfc7f8e8f0a7d2f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-16 21:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870e8eb940db431347dbf402eda437b4 SHA-1: a0bed3c46e67c4443fe444ccb7b0da950b2b0d6e SHA-256: 8dfc7f8e8f0a7d2f278f3dfc9483e35246d8b44c437b0bccc88ab61698046d82
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=sample+format+of+appreciation+certificate', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites under the guise of providing a certificate format. The presence of numerous links, including those on Shopify domains, indicates an attempt to obscure the malicious destination and potentially leverage SEO techniques for distribution.

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.cc/pify?keyword=sample+format+of+appreciation+certificate
    • http://files.earthboundgardens.com/uploads/1/3/2/3/132303077/begifadexisaginafaxe.pdf
    • http://dapetamiw.flyingleadsaddleclub.com/uploads/1/3/1/4/131437208/vipojapigoru.pdf
    • http://files.jpsact.org/uploads/1/3/2/3/132303028/e61e59.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/academic_writing_course_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9998/files/bovobujop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/97457017581.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/pajutiduwojibenemavisava.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/subosobipipa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/linea_base_ambiental_de_un_proyecto_minero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/electrical_engineering_basics.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_off00005afc.bin
d472febde26ec5663613ad4b5241a1796a4c9374bb94a731eb08df5a6e2dfccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFC 4872 bytes
font_01_sfnt_off00006b64.bin
4035f67891de7274e915497401648aa96fefae96db62fe7d68b61901369580f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B64 9716 bytes
font_02_sfnt_off00008c31.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C31 4324 bytes

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