Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e63b5119dfa04f…

MALICIOUS

PDF

39.1 KB Created: 2020-10-08 08:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 059a83f9b2e0c0545eab3522fdaf1cce SHA-1: 39b0d2a5e712958c6b069621fc7baf0dea396508 SHA-256: 32e63b5119dfa04fe08ac6f15905411eb0ce02d0fe9b07ee4f5be6b9a4d79342
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high density of external links, many pointing to disposable domains, indicating a link farm. One prominent URL, 'https://ttraff.me/pify?keyword=cara+mengatasi+no+table+of+figures+entries+found', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=cara+mengatasi+no+table+of+figures+entries+found In PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/37104390858.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/69997228576.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/milineponoxutokajagejub.pdfIn PDF document text
    • https://site-1043698.mozfiles.com/files/1043698/94033030174.pdfIn PDF document text
    • https://site-1040675.mozfiles.com/files/1040675/82346272973.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/991806400.pdfIn PDF document text
    • http://files.oceelearningcommons.com/uploads/1/3/0/7/130739654/lufufofejebuzaverux.pdfIn PDF document text
    • http://zifon.jokerentertain.com/uploads/1/3/0/9/130969465/7818916.pdfIn PDF document text
    • http://rojik.covenantbiblecamp.org/uploads/1/3/0/7/130740592/5050486.pdfIn PDF document text
    • http://files.newelca.org/uploads/1/3/1/8/131856212/kewuwofutotuxajunofe.pdfIn PDF document text
    • http://files.kauaialohawed.com/uploads/1/3/1/8/131871864/darakiz_julorizadixurow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA2 5272 bytes
SHA-256: 4a3cc4843b9854d292af57e012ac232a713bfd20e3e35521efb3acbb9c24b69c
font_01_sfnt_off00006d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D74 10088 bytes
SHA-256: ab5d8d54ce5f6fd21830b9023b28175e7f6df9b56ff7e650fd6fb3cc04037495

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