Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f38fe5fbd34a4f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 10:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f69c09a27e9f9c1873e684d35556a37c SHA-1: 9e9187ad37b63fbdf833fb6d8b63d1a36b87441d SHA-256: d2f38fe5fbd34a4ff4daa3eb31d45d7fa8f04ac3f84ca7581741c2ac74784040
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, 'https://ttraff.com/wix?keyword=hyper+dragon+ball+z+move+list', points to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a potential SEO manipulation or phishing campaign. The document body appears to be garbled text with some embedded URLs, further supporting the malicious link redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=hyper+dragon+ball+z+move+list
    • https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b2b4741eb5f46f79aa0b76dd6a13968.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fa6dc405ed3443ebdf37def48f500db.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcd191c090a4461fa5a54edd0783f4d9.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/identifying_limiting_and_descriptive_adjectives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/96812544511.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/xewirokopag.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/cancer_chemotherapy_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_23fecec424ef42d7b54f54670bc68783.pdf
    • https://static.usrfiles.com/ugd/b8c837_011cb1c16cc1455e9a0c6e68e1e63d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96e6d9c99754abbb5a9873e870e0959.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f5f02556bc54717b8328048df782305.pdf
    • https://static.usrfiles.com/ugd/b8c837_58a4d8aba22841058fb5ae4fc3ea5dc7.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/46570594623.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/2181796853.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/lotegajanuwesajeno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.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_off00006c35.bin
b1aee1a667c98cb0c1d8e544ebf770db4dbae1853f21873c04596118c15d3312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 5592 bytes
font_01_sfnt_off00007f2a.bin
8dbc3c48a5a68e015666518b7b8dad22689aebbccff03c2e56c83bd86afbe184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 10120 bytes

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