Malicious PDF — malware analysis report

Static analysis result for SHA-256 4817b8d11a545fc8…

MALICIOUS

PDF

38.9 KB Created: 2020-08-08 09:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98b592af301c5c6157863df229848730 SHA-1: 3c4b4bc0c59b59cb54f4b37b461a2f4327b1ed0c SHA-256: 4817b8d11a545fc81cc754ef3fe5fc65deb4c947c3a40ad48d852c40f42247e4
150 Risk Score

Malware Insights

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

This PDF file contains a high number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=chromatic+scale+trumpet+finger+chart+pdf', which is designed to lead users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous links, including the identified malicious redirector, suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=chromatic+scale+trumpet+finger+chart+pdf
    • http://kokovubar.helpinghandsrescue.org/uploads/1/3/1/4/131482975/6350427.pdf
    • http://files.cyberbreachplaybook.com/uploads/1/3/0/7/130775977/6cc52fb2a815.pdf
    • http://files.tanawanhandycraft.com/uploads/1/3/0/7/130775554/f8a701d.pdf
    • http://files.neuracing.com/uploads/1/3/0/8/130813866/wodajumev_fepajovelebikip_nisopa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/84010753520.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/printable_world_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/procom_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/95338003005.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/saloseri.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/lavutepitowutunas.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/boguwekozukejawul.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/zufaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5684/8282/files/bolitutonemulewav.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/964135328.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_off00005a70.bin
bc244d542a66021709393faceff87717b18b5ef94cf105072ebf2b1e7eb8e5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A70 5476 bytes
font_01_sfnt_off00006cd8.bin
4b753e877a9f9cd3271100bba762306bf67ec527e8337b214782ec50785ce1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD8 9852 bytes

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