Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c977ff97d22ae5…

MALICIOUS

PDF

35.0 KB Created: 2020-08-15 03:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05937ad450a3292ded785ffe1a1dc4d2 SHA-1: a85f43fb8bb05aeb874ec58e4631664c3c58cf3f SHA-256: 87c977ff97d22ae590a5787b4b5b4ff8bcf2580bc01927606908ccf86eb682b1
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=libro+de+biomagnetismo+medico+pdf', which is also flagged as malicious. This indicates the PDF is likely a lure to redirect users to malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=libro+de+biomagnetismo+medico+pdf
    • http://files.cjaudiology.com/uploads/1/3/1/1/131164425/jamifimixuwix_zajoroko_lazufaba.pdf
    • http://files.channamalkin.com/uploads/1/3/1/3/131383737/mivomolasu.pdf
    • http://lunizile.ruizcombatgrappling.com/uploads/1/3/1/0/131071252/9051b6e404f9423.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/15613775221.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/22904252234.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/sifezilibobonenon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/bible_history_new_testament.pdf
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/47466125440.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/moruwovedopupobex.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/principe_d_une_alimentation_quilibre.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/certificado_de_secundaria_sep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/infarctus_du_myocarde_symptomes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/22668997792.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_off000047d3.bin
7a12a70f2556472dbee535d3d59d0f7248f78dbba178d7a8d3548b6922b721e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47D3 5524 bytes
font_01_sfnt_off00005a81.bin
1dc31a5e4d5faa8be2ce2ad4210b8d4d845b66e1b3353c23c0c91ede757e9669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A81 10804 bytes

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