Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc19879fc00e9707…

MALICIOUS

PDF

54.7 KB Created: 2020-08-06 15:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68577487abb6ec53cd22a1aa292ca28d SHA-1: 66117fee847ef2044a45232279ad174684940c03 SHA-256: cc19879fc00e9707d3a8c0e1cb7f9662df443c9ececca0913e349b75a421eff5
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Exercices corrigés sur atomistique pdf". The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO poisoning attempt. The primary IOC is the malicious redirector URL.

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=exercices+corrig%25C3%25A9s+sur+atomistique+pdf
    • http://files.lynnevestalcounseling.com/uploads/1/3/2/7/132710783/fojelajiku.pdf
    • http://files.fatallyyoursrocks.com/uploads/1/3/2/3/132303181/mamajaf.pdf
    • http://files.townsonsmithdesign.com/uploads/1/3/2/8/132814343/bevupafef.pdf
    • http://files.fatallyyoursrocks.com/uploads/1/3/2/3
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/ruzevanifanuwiwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7175/0822/files/56509684417.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/48328995333.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/46829522797.pdf
    • https://cdn.shopify.com/s/files/1/0431/8442/3073/files/orthographe_francais.pdf
    • https://cdn.shopify.com/s/files/1/0428/5713/6294/files/fuzawesuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8234/1781/files/26738605103.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/buzumadurogugupovitenamez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/rigekokuxobax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.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_off00009139.bin
b133fc6947f16ff04ecffd7befac6eb35b76919ff00d2d9cf3cb6201162273be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9139 5736 bytes
font_01_sfnt_off0000a46b.bin
5e12fba48733f758fbeb0a0308b9acf6b3594106d6bf7ef785556191dd662fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46B 12368 bytes

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