Malicious PDF — malware analysis report

Static analysis result for SHA-256 3627de02ccf84d4c…

MALICIOUS

PDF

34.3 KB Created: 2020-08-20 02:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b80ecf1206128e77077ed95704096ee SHA-1: 144069f0acdc54d43704d66e37e662d4d9f56f3e SHA-256: 3627de02ccf84d4c89da4e856ab82ea638a298cb78d7da0c76573c010791a59d
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to a 'Pearson biology textbook online pdf' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.cc/pify?keyword=pearson+biology+textbook+online+pdf
    • http://files.therapistsmap.com/uploads/1/3/1/3/131381991/tegalugada.pdf
    • http://files.katyamack.com/uploads/1/3/2/6/132682716/7029385.pdf
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/97459611461.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/adobe_master_collection_cs5_serial.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/55821875043.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/12460842801.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90841244024.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0738/files/localhost_using_lrpc.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/8520472046.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/karinagamumipunosalika.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/python_import_iris_dataset.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_off000044c6.bin
6c8abf983bfcb7d5f6290e4f190de24efca5b3e1464e1c6363caa0b9380788a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44C6 5584 bytes
font_01_sfnt_off000057e5.bin
6e9d396a57b4979f1349e202a4558d92e072239c7af0e70c9684b88947a3ed21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E5 10348 bytes

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