Malicious PDF — malware analysis report

Static analysis result for SHA-256 37370c663ee31595…

MALICIOUS

PDF

45.7 KB Created: 2020-09-06 10:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c85fd26f35030867a29346b86413679a SHA-1: b72455e39d362475da84cc1d8505e7135b71cbf0 SHA-256: 37370c663ee315958c30e68a801f78c7ef4c6e7538726408df9f3e9506564057
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as free movie content, which is a common social engineering tactic. The link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

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.cc/wix?keyword=bahubali+full+movie+tamil+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/89441e_58f4bae29bc44b12a989554713a29951.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90c678_3fe6b43174434780ac7496aba949d959.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bf07b1_93e795b8ca6b4ee1a0c7a51b5d181b42.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b47706_23f2d65e784a4ccab2c94be7f2aef0bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ecb7db2ebfd14b9392d61fde998c4381.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/868401_506bfde719764c5f8acede2639d322cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ed902_62a637bf8a344ab9beaecb7b41f9b1bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f6a907_342344fab6ac418191fa5fee7e7bcd42.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/61804c_d2ba04f12db344298ca0074eb319dbab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5899d5_686628f5ff574d3cbdac9ccdbfe3efb4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc089a_b590825678b54837b0ae0c305b9d6f39.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d9e9a0_32c6ee563d8443d382763aae6d3ea970.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bcb9fd_418e6d6fcd8644cead05deea2aaaecea.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6765 4856 bytes
SHA-256: d54e0b587a34d287977ddfbbd01b808efe2b7d0801e8e12a4922c749de81b181
font_01_sfnt_off000077f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F1 10488 bytes
SHA-256: f1cac5b5ce38643c6008064690cf8b3a7ddee5960da64a86c4a0286724b38f30
font_02_sfnt_off00009bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCB 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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