Malicious PDF — malware analysis report

Static analysis result for SHA-256 42445f15cd4b93eb…

MALICIOUS

PDF

39.7 KB Created: 2020-08-17 14:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84164977fe5a2b30b7b661404354685e SHA-1: b3705e48dcb0d6ae1e00aead5cb95fb2ed25bcf6 SHA-256: 42445f15cd4b93ebc77a62afe2a89579f05308523d02bae37804b4eb97c5fc95
120 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple embedded URLs, including a redirector to `https://ttraff.com/pify?keyword=growatt+inverter+spec+sheet`. This technique is commonly used to obscure malicious destinations and distribute malware or conduct phishing attacks. The presence of numerous links, many hosted on Shopify, suggests an attempt to leverage SEO to lure victims. No scripts were extracted from this sample.

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.com/pify?keyword=growatt+inverter+spec+sheet
    • http://files.therocksm.org/uploads/1/3/1/0/131070572/533100.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/37987849954.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/top_ten_sites_for_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/23242631737.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/46105818980.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/35721525677.pdf
    • https://cdn.shopify.com/s/files/1/0436/2082/7300/files/52038560774.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/feels_like_temperature.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/diponiwezimagomu.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_off00005d76.bin
70b8ecb47fa9ea5c85dbcf826b8dba7513e9c95a91de816b8705e661432ed0a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 5172 bytes
font_01_sfnt_off00006f23.bin
d91e1bd9921d5e8d8cb750a851d5726abe2a7e4b43d3ab669de72c66a0a1442b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F23 10312 bytes

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