Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdea165944b86ae…

MALICIOUS

PDF

48.0 KB Created: 2020-08-23 04:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 877233608f3e663f21c4b69c085c176a SHA-1: bdf43752693fe59282bec687ff8df20b61ba151a SHA-256: 2cdea165944b86ae924f04eb8617c324ee842db76cb376fffa689cf818dfe1c9
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=cds+1+2019+marksheet'. This suggests a link farm designed to obscure the final malicious destination. The presence of a 'download button' lure further supports the intent to trick users into downloading potentially harmful content.

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.com/pify?keyword=cds+1+2019+marksheet
    • http://bomowore.wellbeingtahoe.com/uploads/1/3/1/6/131606218/575772.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/abbyy_transformer_3._0_pro_pl.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/93564541731.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/77321058077.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/9592350485.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/32102083324.pdf
    • https://cdn.shopify.com/s/files/1/0440/5323/3814/files/apposer_une_signature_lectronique_sur_un.pdf
    • https://cdn.shopify.com/s/files/1/0428/7614/1731/files/25414901623.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/94232814438.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/9790916903.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_off000073ae.bin
f7672092c42aa79613078a9cc8e4fa8cda7ae82fef761ad1014970598eae8fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 5484 bytes
font_01_sfnt_off0000862d.bin
465e4a7e0b5257931b01879429c45d63fc22769fe455b5a589fd21eca20ca00d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862D 14540 bytes

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