Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93e48599ef8a230…

MALICIOUS

PDF

56.1 KB Created: 2020-08-07 19:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce8f7fa1814f03147eb672b2d32e644 SHA-1: 9c0c740bcd3fdda0da78755356e4208424783682 SHA-256: b93e48599ef8a23062362b6a9f00714a384037b41a0f5bb9ffb037cbb2c0183e
120 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 pointing to Shopify domains hosting other PDFs, which is characteristic of a link farm used for SEO poisoning. One prominent link, 'https://ttraff.ru/pify?keyword=ap+sachivalayam+study+material+in+telugu+pdf', redirects to a malicious domain, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to study material and the malicious URL, reinforcing the lure.

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=ap+sachivalayam+study+material+in+telugu+pdf
    • http://files.windmillpreschoolbrill.com/uploads/1/3/1/6/131637357/sofumemifoxese.pdf
    • http://files.theseedofgod.com/uploads/1/3/1/3/131381640/a6f49b09.pdf
    • http://files.lessonsofalac.com/uploads/1/3/2/6/132681863/tabizomimuju.pdf
    • http://files.3531developments.com/uploads/1/3/1/3/131398573/wakelik.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/venetifanafazes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/74761754786.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/64965224109.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/dugatirax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/dynamic_memory_allocation_functions_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/linkin_park_numb._mp3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/luturikukox.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/46129564256.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2865/files/ironhead_service_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c17.bin
dde237f94fc8422d3fd7e75a0f075a7da0b202e2fe3951de6216ff1db66fe06d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5492 bytes
font_01_sfnt_off00007e9b.bin
6d3be635763f3f8c15fe09bc490bb764c6319db57c11bfa0def34594394d0c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 8312 bytes
font_02_sfnt_off000096f3.bin
e04c6720d062e3bcbc4fe81b256fbe036dfc5fb1a7a1d53b3e521c8f8d962a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F3 14800 bytes
font_03_sfnt_off0000c49d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC49D 4324 bytes

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