Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e355237b0e6deff…

MALICIOUS

PDF

42.2 KB Created: 2020-09-01 15:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43db815b8c77073395a02ba1d20112cf SHA-1: 5719473cfa26dc5e240cb821bf410b3c3ae4ec73 SHA-256: 3e355237b0e6deff5acb14fc233bf6ba751f6d7dbef62aef1627433e8a174254
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'dna rna and protein synthesis study guide' and includes the malicious URL. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing or malware download site.

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.link/wix?keyword=dna+rna+and+protein+synthesis+study+guide
    • https://static.usrfiles.com/ugd/1cc777_b75e3928438e4af1bba31a5d4b495cfe.pdf
    • https://static.usrfiles.com/ugd/defdb4_cb2a5952a2e64688a68e641b42442e59.pdf
    • https://static.usrfiles.com/ugd/2f07a1_5579232b23b44795a673c136624d8437.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/nekozupani.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/wovawuwelojezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/31777826936.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/93940144411.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/2857262426.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2187/files/bridal_march_wagner.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/gufafunozuviliz.pdf
    • https://static.usrfiles.com/ugd/756799_4efd367d3a2a4fc5bab6c5d54872d805.pdf
    • https://static.usrfiles.com/ugd/1f2646_ce80961ae1e7404380c466e64730e2f5.pdf
    • https://static.usrfiles.com/ugd/e4a001_b4335c5bfcdb4c5f98dac634cdf8ea82.pdf
    • https://static.usrfiles.com/ugd/cf14a4_29bba09ed433484cab51daf9c873ae32.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_off0000670f.bin
e70b22ce9c2ccca1a6f38018733375a2a44fa6dc0f68468a61acc2360477339c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 5292 bytes
font_01_sfnt_off00007916.bin
3dfdd0cd658e35afec68d04aba29305f2cf734089473a6fd911133e27f7e9fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7916 10144 bytes

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