Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5120d213f6a1a16…

MALICIOUS

PDF

37.2 KB Created: 2020-09-04 10:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69739aa4d308ca099ce05c0a939822b5 SHA-1: 40fc29967a53511b87211112596a4ab18ddfafe0 SHA-256: c5120d213f6a1a1655cc3ae9e8cdafc2cd90d678cc6d893ef9cf032152f4fa3b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content. No scripts were extracted, limiting the analysis of further payload delivery or execution.

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.me/wix?keyword=conjuguemos+preterite+vs+imperfect+answers
    • https://static.usrfiles.com/ugd/b8c837_2194ea78d2544d08ad7d57aa5fd3d928.pdf
    • https://static.usrfiles.com/ugd/b8c837_d135705168cd4abcae0b1b26b3c28bfb.pdf
    • https://static.usrfiles.com/ugd/b42fd6_2d3a0e1575b24ec99437a46f7f80608c.pdf
    • https://static.usrfiles.com/ugd/c1de29_cb7dc8b86b214bfbbce8841b1f5f2e32.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0bbb218a3344a518b3ca18c344ff1bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa69dcda05904dac861d848e4ad6c543.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa7348c0ba49440286388a7f8114c242.pdf
    • https://static.usrfiles.com/ugd/28b3f7_862ea6b6e5004ffc843bd4413c14f2e8.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/76034350056.pdf
    • https://cdn.shopify.com/s/files/1/0446/7766/0825/files/cataract_classification.pdf
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/kutitade.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/pesalebepizekigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6699/0498/files/22712180440.pdf
    • https://cdn.shopify.com/s/files/1/0457/6405/1100/files/24707260600.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/seven_gifts_of_the_holy_spirit.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_off0000507d.bin
5fc712e7dae5fd4a77eb50916f8be4a8d034390c636e1d016865bcfc4b8d5d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x507D 5436 bytes
font_01_sfnt_off00006301.bin
f00ace4eb8c8350d4d3ab07f7a32b840785118a33874ec2cc41d64c4d2ee080b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 10252 bytes

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