Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8bfb0875a1812f…

MALICIOUS

PDF

58.0 KB Created: 2020-08-17 09:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6234ec35ce061d575cfa032819dbf944 SHA-1: c6f518a43930db075a48a04d7c5736408915e56a SHA-256: 2f8bfb0875a1812fd120d064e798226d1456538b02098ffe386f37b43a4ef319
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Haemolytic uraemic syndrome treatment guidelines' and includes the malicious URL. This suggests a lure to trick users into clicking the link, likely for phishing or malware delivery. The presence of numerous other PDF links, many hosted on Shopify, points to a link farm strategy, potentially for SEO poisoning or distributing further malicious 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=haemolytic+uraemic+syndrome+treatment+guidelines
    • http://fivezo.localzak.com/uploads/1/3/2/7/132710621/2880724.pdf
    • https://cdn.shopify.com/s/files/1/0433/4613/3157/files/suxulejomojoladu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4744/files/protibad_bengali_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/97746313015.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7735/files/7765877102.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/hunter_alignment_rack.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/alesis_nitro_mesh_kit_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/short_business_plan_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/vodabarimevuvijukovuvow.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_off0000a59f.bin
26948ec245b0c38b1f0fcdfdcaf39d5d02f0a1d9e4c1365a7703384b1130071e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA59F 5320 bytes
font_01_sfnt_off0000b7a9.bin
2195d99dd1e146cc17394a85c47ca41c3fcb6f763690a261b0218f3c4659107b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A9 10480 bytes

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