Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ab13bc7b989fd9…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 05:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b9585250d733946720024b4fd6d7f3b SHA-1: bb6d5b22f95f5ebf4a24f27e21c538ff02dd1e61 SHA-256: c5ab13bc7b989fd98fa9f1464e312fe1c3926b6a5caed87215bbd2e9cd86800f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One of the primary links, https://ttraff.ru/pify?keyword=vocabulary+words+with+meaning+in+urdu+and+english+pdf+download, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the document's purpose is to redirect users to potentially harmful content. The presence of numerous other PDF links further supports a link farm or redirection strategy.

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=vocabulary+words+with+meaning+in+urdu+and+english+pdf+download
    • http://files.thehappyhedon.com/uploads/1/3/0/8/130813846/04887a3.pdf
    • http://files.streetervillepediatrics.com/uploads/1/3/1/0/131071166/wifaxele_tokaredika_kupaba.pdf
    • http://files.ecocruising.com/uploads/1/3/1/0/131070051/bujoravubov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8556/8923/files/vifutumirukedasafufapabig.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/ultralight_backpacking_tips.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/78573961071.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/69567503194.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/62027845788.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/jovowelanevatawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/tigawikewujosipopuremari.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/banogibumagomala.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/95929746294.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/rizeliludi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0156/files/dodakizatozevi.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_off00006612.bin
10c5eddb511b359615f0b53aa099058c8fd3932c514a62b8bb7da41fc6600e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 5868 bytes
font_01_sfnt_off000079fe.bin
99a54130bd74fefb7e46315c92b7ee36bed75fe82cdac59d21cf6e113e4892b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 10132 bytes

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