Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccc1a0a98286735…

MALICIOUS

PDF

193.5 KB Created: 2020-08-24 13:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4189f0e89dfab9872f08f6b2769c6673 SHA-1: 8da9713374f786ae66f2d19f6d3f9e0f66539575 SHA-256: 6ccc1a0a98286735741c301d56da2e6bade8f4624e5ed46588787cc0e90bf16a
134 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified as 'ttraff.com'. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a social engineering scheme to trick users into downloading password-protected archives, which often contain malware. The ML classifier also strongly indicated maliciousness.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=cpwd+publications+pdf
    • http://files.isabellerowan.com/uploads/1/3/0/7/130776483/2818447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/administrao_pblica_brasileira_para_concursos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/19257507050.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/antidiabetic_activity_of_plants.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/68561651514.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/banjo_tooie_jiggies_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/kipupuwopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9462/files/94110467229.pdf
    • https://cdn.shopify.com/s/files/1/0432/9652/2398/files/lipisamumemugim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/office_attendance_format_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/11996933231.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/18931105898.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_off0002b136.bin
cda428ded134a979889e6ebe2db30a073af5392c998e238ca9bc672cff4de45d
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B136 5192 bytes
font_01_sfnt_off0002c2ff.bin
63cf3a0d7c68c891774b0e64ff0fd0c6311e4c73aeaabe2c4dbedbb5130675e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2FF 16992 bytes