Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca4edf13079f19a…

MALICIOUS

PDF

37.4 KB Created: 2020-09-09 19:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13c8b141c53df272d7108a564e14a0d8 SHA-1: 97599af4c7f19b27c8ad0427a6e3f6628b2a5ab7 SHA-256: 4ca4edf13079f19ae8565dd6a568a1927922bdb67dc2e8d10b02b79ff2044944
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=giza+dream+sheets+my+pillow', which is flagged as malicious. This indicates a likely attempt to redirect the user to a malicious site for phishing or malware delivery.

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.link/wix?keyword=giza+dream+sheets+my+pillow
    • http://files.kittykissies.com/uploads/1/3/0/9/130969997/0665c1.pdf
    • http://vazom.creativeteachers.ca/uploads/1/3/1/4/131408984/8886371.pdf
    • http://files.teethwhiteningmonterey.com/uploads/1/3/2/6/132696335/5cde3.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_4ce834aa1f7745ec9f905c2244c26691.pdf
    • https://static.usrfiles.com/ugd/575363_1fd624115a8b4765b9e47f110791b622.pdf
    • https://static.usrfiles.com/ugd/3b7182_09bd1511afb5416992decddd85ebf4d8.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_6e44ebce2eff4516b67e8baddb6fe59c.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/67724264835.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/19836622924.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3152/files/xurefazufadojasesi.pdf
    • https://cdn.shopify.com/s/files/1/0447/6397/1733/files/xubusetagejon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/calcioantagonistas_mecanismo_de_accion.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/67825975097.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/1770270224.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_off00005262.bin
2587dbb406f1cc69d510fde342b2a3b13da2ac4aadd4f07ba799f04ac35eee19
pdf-font-stream PDF embedded font (sfnt) at offset 0x5262 5472 bytes
font_01_sfnt_off000064f4.bin
4442ab5ce865e7336ca8884e523e4f6b10f5aa77922410e0d2cb51db1d3e7c33
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 10556 bytes