Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d9d017ba679a9b…

MALICIOUS

PDF

35.6 KB Created: 2020-09-17 03:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0076a4eefc28f24a489b6ad742612322 SHA-1: 28261f79606248d6302d00f2bc8ed1ea2ade5e50 SHA-256: f6d9d017ba679a9b27a03d6c40fdac53ad25e0d47674c70267683e5008337dc1
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to a malicious URL, disguised as search results for a school phone number. This indicates a phishing or redirection attempt. The ML classifier strongly supports the malicious verdict.

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.com/wix?keyword=casey+westfield+high+school+phone+number
    • http://misigi.stepin2myoffice.com/uploads/1/3/2/7/132710712/zilenukomigujuse.pdf
    • http://files.irisandtheivf.com/uploads/1/3/0/7/130738792/lopinemogulub.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • http://files.chihuahuafrentealcambioclimatico.com/uploads/1/3/1/4/131437702/3912376.pdf
    • http://zotawide.waspruikle.com/uploads/1/3/0/7/130739197/741826.pdf
    • https://5a4ed51b-8b29-4a59-8e80-c8c2e7dbafc9.filesusr.com/ugd/1e52da_dd8faa071d814ea3846bf7438feb2471.pdf?index=true
    • https://7d9f1a32-e83b-47a7-a2f7-aac3bc89a056.filesusr.com/ugd/dcc11b_848f46d7ef9e4090993e02602683ce21.pdf?index=true
    • https://bd602b25-da02-4ccd-95df-43262ac7bc13.filesusr.com/ugd/cfbfd2_05e9b23836cd42539363649b56136d6f.pdf?index=true
    • https://e69fcb53-1179-40c9-be1b-fe5b123f9ec4.filesusr.com/ugd/a382ee_b39fb7c22387457ea8910b8ca7e5b65c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/49812115714.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/69577630261.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/52473749921.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/51186230986.pdf
    • https://cdn.shopify.com/s/files/1/0482/8577/8081/files/sidatejuwazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/character_education_worksheet.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_off00004897.bin
478f91b82bb50b4cbf760c432c4063987cd1e978274f89a4528093d5a2b4c858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4897 5808 bytes
font_01_sfnt_off00005c47.bin
d8570c849b2c2b66f8a577da467b474548255ce6624af71c1d6fd6fac6e1aa8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C47 10376 bytes

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