Malicious PDF — malware analysis report

Static analysis result for SHA-256 5161c1b60b91e770…

MALICIOUS

PDF

47.4 KB Created: 2020-08-12 19:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e10e74f0f66eab25e2244b270942175 SHA-1: 4f8a3c317be04f2385fad654214b0e0c6e52e6b3 SHA-256: 5161c1b60b91e770b1cec679237506e834d783f28dd5378f1e00e1625cdb5e60
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One critical heuristic indicates that the document links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=chemistry+in+everyday+life+class+12+ncert+solutions+pdf', suggesting a lure to download or view educational content that ultimately redirects to a malicious site. The presence of a visual download button further supports this phishing attempt.

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.ru/pify?keyword=chemistry+in+everyday+life+class+12+ncert+solutions+pdf
    • http://xamidorow.sevenlakessubdivision.com/uploads/1/3/0/7/130775997/9293972.pdf
    • http://files.knowledgeisempowering.com/uploads/1/3/2/6/132695388/37f95f2f8d.pdf
    • http://makowesi.theroyalapartment.com/uploads/1/3/1/4/131438216/6197120.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/lelozanup.pdf
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/20566293719.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/3568697758.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/sprint_web_texter_plus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/32775385656.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/tongue_twister_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/kopizeguzepukolosinefoza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/wavebazinoxufugizit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2752/8871/files/administracion_de_recursos_humanos_snell_bohlander_17a_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jufozigazagapuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/48506145796.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/26980179922.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3381/files/aldehyde_ketone_and_carboxylic_acid_target.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_off00006aa0.bin
f011831406fd5887dca64600b5264a3731fc56b6d1d2792c8cf38c4c192cdfd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 5644 bytes
font_01_sfnt_off00007dbf.bin
09b572e2a0c0ae36f77835daae38b948b72e3323a9207bd2a1e13144c513a22c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 10604 bytes
font_02_sfnt_off0000a1c0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C0 4324 bytes

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