Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9641de352b5677c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 07:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d7efcdb2476706252c30428cf30d4ad SHA-1: fbd7d190791d7d110fa4c5ede7bec1d5bcfaeb53 SHA-256: b9641de352b5677c2166ee49591a540c3b1283c9b5d8091aba861c17c40b38f4
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the document's primary purpose is to redirect users to malicious content, likely for further exploitation or phishing.

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.cc/wix?keyword=the+5th+wave+book+series+pdf
    • https://static.usrfiles.com/ugd/e2c6c1_0ed870e30f724252a49303f7447d37b8.pdf
    • https://static.usrfiles.com/ugd/3aca14_10cf3066aeb1487899cafbdcd0e477db.pdf
    • https://static.usrfiles.com/ugd/82e28d_7535e5acca3443e98fa2ecdbe538a7fd.pdf
    • https://cdn.shopify.com/s/files/1/0439/2353/8088/files/nsfas_bursary_application_forms_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/tabutabezelakekepasop.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/26383687744.pdf
    • https://static.usrfiles.com/ugd/3bca44_8adb4a40c0734186a0f56de57fb059f7.pdf
    • https://static.usrfiles.com/ugd/9e41f0_87aaf0ba150e45ddbe0364ed84788f09.pdf
    • https://static.usrfiles.com/ugd/21a131_8ced773575264bb88aa7abfaf2d2d71f.pdf
    • https://static.usrfiles.com/ugd/32acb1_ec68f3ea4d6f47539b1e19f68e0aab38.pdf
    • https://static.usrfiles.com/ugd/b8c837_910e7a75e1584e87aaf707987ae68d13.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3775/files/i3_gaps_on_caelinux.pdf
    • https://cdn.shopify.com/s/files/1/0458/2745/7187/files/66351299834.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_off000060ac.bin
95576e5db4543365ea0a7bbbb02f968c8ef8c7d4bccba0d825c440299a17636e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5528 bytes
font_01_sfnt_off00007387.bin
27af749405bc4e9e0859bf29257cc60405c2a170d22eb26807649449ab1254f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10076 bytes

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