Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d1323542c7f166…

MALICIOUS

PDF

50.1 KB Created: 2020-08-31 09:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0401793632472ec8e18c80d43a5db4 SHA-1: 9f59d08794fecb95cb25ed535c858a184255941b SHA-256: 08d1323542c7f166d8f89bfaa56141c82597814d482932e4d636f31043fd881c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as a music download, but it redirects to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to distribute further malicious content or engage in SEO poisoning. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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=todocaleta+descargar+musica+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/quantum_computing_since_democritus_p.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0643/files/zixutivej.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/kizasuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/90820267541.pdf
    • https://static.usrfiles.com/ugd/b98abb_d5a6934e01a34b7fb6cdd9fe196a30aa.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_d6352df466db4f99a8ab580edc53fda4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a7a3304c6474d6ca47f26549268ee81.pdf
    • https://static.usrfiles.com/ugd/9b33c5_3387826a4b3e4dc293b16a6bb2a50e46.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3cc08bbea914980af47646a1456721e.pdf
    • https://static.usrfiles.com/ugd/43d598_0d332dafeb2b41888eeb87fce7a2a631.pdf
    • https://static.usrfiles.com/ugd/99afdc_a3741943cafa481a9012d8e2cb3bbe79.pdf
    • https://static.usrfiles.com/ugd/576447_9b357272c49545069469ad4d8d8c7a67.pdf
    • https://static.usrfiles.com/ugd/b8c837_64e5bb49698a4c9bad2780874bc10da0.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d5.bin
851eef7e2c620c23052cf2d6f97c6cc681de6a9cfa3c99482717a21510ffe49b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 4164 bytes
font_01_sfnt_off00006f54.bin
d850793311d3cf1c27715e8d8781d2b203bdfbcc4b34a41154e1c2462b3faf77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 5508 bytes
font_02_sfnt_off000081ee.bin
0e0259ac06b5e63c9fbbe0b63de04b6375a8b8a1b56afe9f0e4286666c95e82a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EE 2128 bytes
font_03_sfnt_off00008bbd.bin
52c337badc96fd8a944a56852581e900b66d75dfed03578d72ca4fd0163389d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBD 15324 bytes

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