Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2776a92e4baa97…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 05:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5563a29661303d6bb367999b45087fba SHA-1: 6daadd45f09ba22083b354d46a278f3df60cf245 SHA-256: 6f2776a92e4baa976d3c185280183cfc90a5bcf06923280b43b76bbf0f56b38d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link, 'https://ttraff.me/wix?keyword=hermitcraft+season+5+map', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious or unwanted content through a link farm strategy. No scripts were extracted, and the document body primarily consists of obfuscated text and URLs.

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.me/wix?keyword=hermitcraft+season+5+map
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/jiridirajepiruguxed.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/novel_andrea_hirata_sebelas_patriot.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/gastroparesis_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/38727631560.pdf
    • https://static.usrfiles.com/ugd/409ca8_6d189f02521d42809fd44864a0512d61.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a7a3304c6474d6ca47f26549268ee81.pdf
    • https://static.usrfiles.com/ugd/b8c837_139a9c5d3b4441b29ca999ea5cdc596e.pdf
    • https://static.usrfiles.com/ugd/0d2908_b6b595dc4e89473e89e55d61308c6e62.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_d4926979f7d847c1ad0c5f044b74c0c9.pdf
    • https://static.usrfiles.com/ugd/67e251_ce12b51248b0484382cd1af48ea79773.pdf
    • https://static.usrfiles.com/ugd/b8c837_854749b94cf34baca9ab932ae6fd90a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_790dd339d1a04b8fb4af639928740fc0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005627.bin
37264dac83661998c3ccc84174cdf0c23204d745e96f408624d7779a096f7a81
pdf-font-stream PDF embedded font (sfnt) at offset 0x5627 5216 bytes
font_01_sfnt_off000067ca.bin
88d4073f8240885566a381503e38b82ca9a99ab9fa142097c4d606311c18d782
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CA 15264 bytes