Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57a1f5f883c8257…

MALICIOUS

PDF

59.3 KB Created: 2020-09-07 13:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0644eb32d0175bb0e3afd68bba8f52e SHA-1: 1bb06c8ba171ca24a7382bc9430998d121194913 SHA-256: a57a1f5f883c8257c0a714a491272733ede44ff83221e84a510e94a677ebc0e4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.link/wix?keyword=ark+pvp+engram+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting the intent is to redirect the user to malicious infrastructure.

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.link/wix?keyword=ark+pvp+engram+guide
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/video_film_baby_s_day_out.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/52494059245.pdf
    • https://cdn.shopify.com/s/files/1/0463/5797/1110/files/romofom.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/philips_universal_remote_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2121/2570/files/najowavaw.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_7d94cbec2a324cb88605fe7833375cb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f875d4407444259a3dbeb4d55c5e712.pdf
    • https://static.usrfiles.com/ugd/81d6a4_c94e691d51c54cd09c7a54adaaa2d041.pdf
    • https://static.usrfiles.com/ugd/98e298_91cfee132e6b444288cab1c5f1e14bff.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/nugasejirubilevanizemozaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/1773617941.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/85956729265.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_off0000abbf.bin
1394d38592231deefadb613f478eefc0e31d427cab3f69bef219775e696338ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABBF 5184 bytes
font_01_sfnt_off0000bd5f.bin
ff369837b5032e82e4588e14fe714d16eeacef9cac0bb2a5115f7236c9a84529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5F 10332 bytes

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